Macroalgae Traits
type: ConceptScheme
creator: LifeWatch Italy
date: 2017-03-17
modified: 2018-10-02 15:44:16
language: en
has top concept: Trait

Annual
type: Concept
definition: The thallus survives more than 1 month but less than 1 year.
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-07-27 15:41:24

Autumn
type: Concept
definition: The thallus can be observed in autumn.
in scheme: Macroalgae Traits
broader: Thallus Seasonality
created: 2017-10-09 15:16:08

Blooming
type: Concept
definition: Episodes of intense growth and mass proliferation of a macroalgal population (eg. green-tide of Ulva spp.)
in scheme: Macroalgae Traits
broader: Phenological Trait
created: 2017-10-09 15:12:24

Branched
type: Concept
definition: A thallus forming lateral branches (and branchlets) from the main axis.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-10-09 15:40:31

Calcareous Articulated
type: Concept
definition: Segmented thallus that is encrusted or impregnated with lime.
in scheme: Macroalgae Traits
broader: Calcareus
created: 2017-10-09 15:40:31
modified: 2018-06-28 13:12:24

Calcareous Non-articulated
type: Concept
definition: Non-segmented thallus that is encrusted or impregnated with lime.
in scheme: Macroalgae Traits
broader: Calcareus
created: 2017-10-09 15:40:31
modified: 2018-06-28 13:12:45

Calcareus
type: Concept
definition: A thallus chalky, pertaining to lime, limy, or chalk-white.
note: Guiry M.D. and Guiry G.M., 2018.
in scheme: Macroalgae Traits
broader: Thallus Texture
narrower: Calcareous Articulated
narrower: Calcareous Non-articulated
narrower: Non-calcareous
created: 2017-05-25 14:01:12
modified: 2019-04-01 10:57:57

Canopy
type: Concept
definition: A thallus forming a true shade-canopy.
in scheme: Macroalgae Traits
broader: Thallus Vertical Space Used
created: 2017-10-09 15:40:31

Carposporophyte Generation
type: Concept
definition: In florideophycean red algae, the minute "parasitic" plantlet formed on the female gametophyte after fertilization.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Generation Type
created: 2017-07-28 10:34:38
modified: 2018-06-28 13:06:46

Cartilagineous
type: Concept
definition: Thallus of firm texture, not soft, flexible and springy.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Texture
created: 2017-05-25 14:01:12
modified: 2017-11-29 11:56:05

Compressed
type: Concept
definition: A thallus partially but not completely flattened; cross section larger in one dimension than the other.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Crustose
type: Concept
definition: A thallus crust-like and growing as a thin fleshy or calcified layer against the substratum; therefore often referred to as a fleshy or calcified crust; also a term used to describe a nongeniculate coralline thallus that is more or less flattened and horizontally expanded, is not taeniform, and has readily recognizable dorsal and ventral surfaces (based upon the Latin word crusta (crust)
note: Guiry M.D. and Guiry G.M. (2018)
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2019-04-01 11:03:50
modified: 2019-04-01 11:03:58

Cystocarp Fertility
type: Concept
definition: In florideophycean red algae, the number of tetrasporophyte recruits in year t+ 1 divided by the number of cystocarps produced in year t.
note: Engel et al., 2001 doi:https://doi.org/10.1046/j.1365-2745.2001.00567.x
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-08-18 10:40:08
modified: 2018-06-28 13:07:57

Cystocarp Production
type: Concept
definition: In florideophycean red algae, the average number of cystocarps in a cm3 of thallus (assuming a branch diameter of 1 mm), multiplied by the total volume of the female individual.
note: Engel et al., 2001
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-07-11 12:05:52
modified: 2018-06-28 13:08:16

Demographic Trait
type: Concept
definition: The quantitative traits of populations with reference to their size, density, distribution, and other vital statistics.
in scheme: Macroalgae Traits
broader: Macroalgae Trait
narrower: Population Density
narrower: Total biomass
created: 2017-07-11 12:04:03
modified: 2017-08-18 08:51:02

Dendroid
type: Concept
alternative label: Arbuscular
definition: A thallus having the shape or characteristics of a tree.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12
modified: 2019-03-27 09:42:39

Digenetic
type: Concept
definition: A morphological life history with two generations occurring, either diploid or haploid, and two types of organisms (gametophyte & sporophyte).
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Life Cycle
narrower: Digenetic diplohaplophasic heteromorphic
narrower: Digenetic diplohaplophasic isomorphic
created: 2017-07-27 15:31:54
modified: 2017-07-27 15:32:48

Digenetic diplohaplophasic heteromorphic
type: Concept
definition: A life history having two generations (diploid and haploid) that are heteromorphic.
note: Guiry M.D. and Guiry G.M., 2019
in scheme: Macroalgae Traits
broader: Digenetic
created: 2019-04-01 11:09:04

Digenetic diplohaplophasic isomorphic
type: Concept
definition: A life history having two generations (diploid and haploid) that are isomorphic.
note: Guiry M.D. and Guiry G.M., 2019
in scheme: Macroalgae Traits
broader: Digenetic
created: 2019-04-01 11:10:23

Diplontic
type: Concept
definition: A life cycle characterized by a diploid adult stage producing haploid gametes by meiosis, the zygote forming by fusion of a pair of gametes.
note: Lincoln et al., 1998
in scheme: Macroalgae Traits
broader: Phases Alternance
created: 2017-07-11 12:05:52

Discoid
type: Concept
definition: A thallus forming a flattened disc with a rounded outline.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-10-09 15:40:31

Encrusting
type: Concept
definition: Flattened corticated thalli forming crusts strictly attached to the substratum.
note: Balata et al. (2011).
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Encrusting
type: Concept
definition: Flattened corticated thalli forming crusts strictly attached to the substratum.
note: Balata et al. 2011
in scheme: Macroalgae Traits
broader: Thallus Vertical Space Used
created: 2017-10-10 12:11:06

Ephemeral
type: Concept
definition: The thallus survives only a few weeks, less than 1 month.
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-10-09 15:11:47

Epiphyte
type: Concept
definition: Plants (algae) growing on top of other plants (algae) in a non-parasitic relationship.
in scheme: Macroalgae Traits
broader: Thallus Vertical Space Used
created: 2019-04-01 11:30:45

Erect
type: Concept
definition: A thallus extending upright from the substratum.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-10-09 15:40:31

Fecundity
type: Concept
definition: The total number of offspring (i.e. spores) produced either by an individual or by a population of a species in the given time period (i.e. a month, a year, etc.)
note: Engelen & Santos (2009) doi:10.1111/j.1365-2745.2009.01501.x Santos & Duarte (1996) doi: 10.1007/978-94-009-1659-3_31
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-07-27 15:31:54

Filamentous
type: Concept
definition: A very fine thallus, hairlike.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Shape
narrower: Filamentous Pluriseriate
narrower: Filamentous Uniseriate
narrower: Haplostichous
narrower: Polystichous
created: 2017-05-25 14:01:12

Filamentous Pluriseriate
type: Concept
definition: A filament formed by a line/chain of cells, two or more cell wide
note: Balata et al., 2011
in scheme: Macroalgae Traits
broader: Filamentous
created: 2017-05-25 14:01:12
modified: 2018-06-28 13:09:03

Filamentous Uniseriate
type: Concept
definition: A filament formed by a single line/chain of cells joined at their walls
note: Balata et al., 2011
in scheme: Macroalgae Traits
broader: Filamentous
created: 2017-05-25 14:01:12
modified: 2018-06-28 13:09:19

Flat
type: Concept
definition: A thallus having a generally flattened appearance, no protuberances and a low horizontal habit of growth.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Fleshy
type: Concept
definition: Succulent algal forms, relatively thick, soft and smooth in texture; pulpy.
note: Diaz-Pulido, G. and McCook, L. July 2008, ‘Macroalgae (Seaweeds)’ in Chin. A, (ed) The State of the Great Barrier Reef On-line, Great Barrier Reef Marine Park Authority, Townsville.
in scheme: Macroalgae Traits
broader: Thallus Texture
created: 2017-05-25 14:01:12

Foliose
type: Concept
definition: A thallus bearing leaves or leaf-like structures; having the appearance of a leaf.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Functional Trait
type: Concept
definition: Any morphological, phenological or physiological trait, which impacts organism fitness.
in scheme: Macroalgae Traits
broader: Macroalgae Trait
narrower: Life History Trait
narrower: Morphological Trait
narrower: Phenological Trait
narrower: Physiological Trait
created: 2017-07-28 10:50:08

Gametophyte Generation
type: Concept
definition: The haploid generation (phase) in a plant's life-cycle of that produce sexual organs (gametangia)
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Generation Type
created: 2017-07-28 10:34:38
modified: 2018-06-28 13:07:02

Gelatinous
type: Concept
definition: Thallus with jelly-like texture.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Texture
created: 2017-05-25 14:01:12

Generation Type
type: Concept
definition: One of the two or more phases in the life history of a plant.
note: Guiry M.D. and Guiry G.M. (2018).
in scheme: Macroalgae Traits
broader: Reproduction
narrower: Carposporophyte Generation
narrower: Gametophyte Generation
narrower: Sporophyte Generation
narrower: Tetrasporophyte Generation
created: 2017-10-09 15:22:33
modified: 2018-03-17 18:56:37

Globose
type: Concept
definition: A thallus approximately spherical, ovoid or globular.
note: Brusca, 1980
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Growth Rate
type: Concept
definition: An increase in size and volume of the thallus.
note: Hurd et al., 2014
scope note: (g/L)/T
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-08-18 10:51:48
modified: 2018-03-17 18:36:44

Haplodiplontic
type: Concept
definition: Both haploid and diploid forms, with gametophytes giving rise to haploid gametes, and sporophytes giving rise to haploid spores by meiosis.
in scheme: Macroalgae Traits
broader: Phases Alternance
created: 2017-07-11 12:05:52

Haplontic
type: Concept
definition: A life cycle in which meiosis occurs in the zygote to produce the haploid phase but in which only the zygote is diploid.
note: Lincoln et al., 1998
in scheme: Macroalgae Traits
broader: Phases Alternance
created: 2017-07-11 12:05:52

Haplostichous
type: Concept
definition: In brown algae, an erect uniseriate filament.
in scheme: Macroalgae Traits
broader: Filamentous
created: 2019-04-01 11:15:04

Heteromorphic
type: Concept
definition: Life cycle where the gametophyte and sporophyte generations are morphologically different.
note: Guiry & Guiry (2019)
in scheme: Macroalgae Traits
broader: Phases Resemblance
created: 2017-07-27 15:31:54
modified: 2017-10-10 12:32:47

Isomorphic
type: Concept
definition: Life cycle where the gametophyte and sporophyte generations are morphologically similar.
in scheme: Macroalgae Traits
broader: Phases Resemblance
created: 2017-07-27 15:31:54
modified: 2017-10-10 12:32:30

Lanceolate
type: Concept
definition: A thallus lance shaped and usually elongate.
note: Brusca, 1980
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Leathery
type: Concept
definition: Thick and tough thallus.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Texture
created: 2017-05-25 14:01:12

Life History Trait
type: Concept
definition: Traits that describe the life history characteristics of a species (eg. morphological and cytological traits, reproductive strategies, etc.).
in scheme: Macroalgae Traits
broader: Functional Trait
narrower: Cystocarp Fertility
narrower: Cystocarp Production
narrower: Fecundity
narrower: Growth Rate
narrower: Phenotypic Plasticity
narrower: Reproduction
narrower: Survival Strategies
created: 2017-07-27 15:20:34
modified: 2018-02-23 11:48:48

Long Perennial
type: Concept
definition: The thallus or part thereof with a lifespan exceeding 3 years.
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-10-09 15:11:47
modified: 2018-06-28 13:14:05

Macroalgae Trait
type: Concept
definition: Any measurable or observable characteristic related to macroalgae species.
in scheme: Macroalgae Traits
broader: Trait
narrower: Demographic Trait
narrower: Functional Trait
created: 2017-11-29 10:20:27

Maximum Thallus Diameter
type: Concept
definition: The diameter of the main thallus, when the shape is not foliose.
in scheme: Macroalgae Traits
broader: Thallus Size
created: 2017-07-11 12:05:52
modified: 2018-06-28 13:10:32

Maximum Thallus Length
type: Concept
definition: The distance from the holdfast to the longer blade or axis.
in scheme: Macroalgae Traits
broader: Thallus Size
created: 2017-07-11 12:05:52
modified: 2018-06-28 13:10:13

Membranous
type: Concept
definition: A thallus like a very thin sheet, usually translucent, somethimes with a texture almost like a polythene bag.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Texture
created: 2017-05-25 14:01:12

Monogenetic
type: Concept
definition: A morphological life history in which only one generation occurs, either diploid or haploid.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Life Cycle
narrower: Monogenetic Diplophasic
narrower: Monogenetic Haplophasic
created: 2017-07-27 15:31:54
modified: 2017-07-27 15:35:55

Monogenetic Diplophasic
type: Concept
definition: A life history having one morphological generation that is diploid with gametic meiosis.
note: Guiry M.D. and Guiry G.M., 2019
in scheme: Macroalgae Traits
broader: Monogenetic
created: 2019-04-01 11:18:09
modified: 2019-04-01 11:20:02

Monogenetic Haplophasic
type: Concept
definition: A life history having one morphological generation that is haploid with zygotic meiosis.
note: Guiry M.D. and Guiry G.M., 2019
in scheme: Macroalgae Traits
broader: Monogenetic
created: 2019-04-01 11:20:37

Monosiphonous
type: Concept
definition: Thallus axis made up a single row of cells. May also covered with small cortical cells.
note: Sue Hiscock (1986) A field key to the British red seaweeds (Rhodophyta)
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2019-04-02 08:40:43

Morphological Trait
type: Concept
definition: Any measurable phenotypic characteristic (form and structure) of an organism, which is relatively simple to measure, easily observable and with a potentially well-defined relation to physiology and ecology.
in scheme: Macroalgae Traits
broader: Functional Trait
narrower: Thallus Shape
narrower: Thallus Size
narrower: Thallus Texture
narrower: Thallus Vertical Space Used
created: 2017-05-25 14:02:16
modified: 2017-08-31 10:04:32

Non-calcareous
type: Concept
definition: Thallus not encrusted or impregnated with lime.
in scheme: Macroalgae Traits
broader: Calcareus
created: 2017-10-09 15:40:31
modified: 2017-11-29 11:49:36

Nutrient-uptake Rate
type: Concept
alternative label: Nutrient-uptake Capacity
definition: The abilities of organisms to sequester nutrients from the substrate (eg. NO3 and NH4).
note: Button, 1998
scope note: μmol gr-1 h-1
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2017-07-27 15:12:31
modified: 2018-02-23 14:44:06

Perennial
type: Concept
definition: The thallus survives for three or more years, usually becoming reproductive in the second and subsequent years.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-07-27 15:41:24

Phases Alternance
type: Concept
definition: Alternation of cytological generations during the life history of a plant.
note: Guiry M.D. and Guiry G.M. (2018)
in scheme: Macroalgae Traits
broader: Reproduction
narrower: Diplontic
narrower: Haplodiplontic
narrower: Haplontic
created: 2017-10-09 15:18:58
modified: 2018-06-28 13:06:07

Phases Resemblance
type: Concept
definition: Morphological resemblance of the generation type in the life history of a plant.
in scheme: Macroalgae Traits
broader: Reproduction
narrower: Heteromorphic
narrower: Isomorphic
created: 2017-10-09 15:21:07
modified: 2018-06-28 13:06:25

Phenological Trait
type: Concept
definition: A growth and development trait which is the timing of the occurrence of organism structure development stages and the relevant biological processes.
in scheme: Macroalgae Traits
broader: Functional Trait
narrower: Blooming
narrower: Thallus Life Cycle
narrower: Thallus Life Span
narrower: Thallus Seasonality
created: 2017-09-13 14:36:05
modified: 2018-06-28 12:42:13

Phenotypic Plasticity
type: Concept
definition: The capability of a genotype to change its phenotype according to prevailing environmental conditions.
note: Bijlsma, R. and Loeschcke, V. (2005), Environmental stress, adaptation and evolution: an overview. Journal of Evolutionary Biology, 18: 744-749. doi:10.1111/j.1420-9101.2005.00962.x
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-07-27 15:31:54
modified: 2018-03-01 11:43:21

Photosynthetic Ability
type: Concept
definition: The photosynthesis ability (TO:0000316) determined by measurements on photosynthesis, pigment content or the content and composition of enzymes associated with photosynthesis of a plant or of the plant part under stress.
in scheme: Macroalgae Traits
broader: Physiological Trait
related match: TO_0000316
created: 2017-05-05 10:23:47
modified: 2018-02-23 14:47:54

Photosynthetic Rate
type: Concept
definition: The total amount of carbon fixed by the plant per unit time and measured by determining the changes in CO2 concentration over a plant leaf in a glass enclosure.
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2017-05-05 10:26:42
modified: 2018-02-23 14:58:43

Photosynthetically Active Radiation
type: Concept
alternative label: PAR
definition: The number of moles of photons in the radiant energy between 400 nm and 700 nm received by a surface for a specified amount of time during the photosynthesis process.
note: Hurd et al (2014) Seaweed ecology and physiology
scope note: mol photons m-2 s-1
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2017-07-27 15:09:20
modified: 2018-02-23 15:22:52

Physiological Trait
type: Concept
definition: Any trait involving biochemical processes consistent with the normal functioning of an organism.
in scheme: Macroalgae Traits
broader: Functional Trait
narrower: Nutrient-uptake Rate
narrower: Photosynthetic Ability
narrower: Photosynthetic Rate
narrower: Photosynthetically Active Radiation
narrower: Respiration Rate
narrower: Tissue C/N Ratio
narrower: Tissue N:P Ratio
created: 2017-05-05 09:57:34
modified: 2017-05-25 13:57:53

Pinnate
type: Concept
definition: Thallus with lateral segments alternate or opposite arranged along each side of an axis or branch; their arrangement is feather-like.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-10-09 15:40:31

Polysophonous
type: Concept
definition: Thallus axes in cross-section consisting of a central cell surrounded by a number of pericentral cells.
note: Sue Hiscock (1986) A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2019-04-02 08:38:46

Polystichous
type: Concept
definition: In brown algae, an erect filament, wich is uniseriate at the apex and became pluseriate below, by vertical and transverse divisions.
in scheme: Macroalgae Traits
broader: Filamentous
created: 2019-04-01 11:15:51

Population Density
type: Concept
definition: The number of conspecific individuals in a given area or volume.
note: Guiry M.D. and Guiry G.M., 2018 doi:
in scheme: Macroalgae Traits
broader: Demographic Trait
created: 2017-11-29 10:52:14

Prostrate
type: Concept
definition: Thallus trailing on the substrate.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-10-09 15:40:31

Pseudoperennial
type: Concept
alternative label: Deciduous perennial
definition: The equivalent of a herbaceous perennial on land, with the majority of the plant dying back during an adverse season and regenerating later from a residual basal (often cryptic) remnant.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-07-27 15:41:24

Reproduction
type: Concept
definition: The development of one or more new organisms from the whole or from part of the protoplasm of a parent organism.
note: Guiry M.D. and Guiry G.M. (2018)
in scheme: Macroalgae Traits
broader: Life History Trait
narrower: Generation Type
narrower: Phases Alternance
narrower: Phases Resemblance
created: 2017-10-03 10:54:14
modified: 2018-03-17 18:55:46

Respiration Rate
type: Concept
definition: The total amount of carbon lost metabolically by the plant per unit time and measured by determining the increase in CO2 concentration over a plant leaf in a glass enclosure.
scope note: mm3 g-1 min-1
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2017-05-05 11:11:39
modified: 2018-06-28 13:15:15

Seasonal Annual
type: Concept
definition: An annual plant occurring during a specific season of the year, such as the winter or spring.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-07-27 15:41:24
modified: 2018-06-28 13:14:27

Short Perennial
type: Concept
definition: The thallus or part thereof with a lifespan exceeding 1 year but under 3 years.
in scheme: Macroalgae Traits
broader: Thallus Life Span
created: 2017-10-09 15:11:47
modified: 2018-06-28 13:14:47

Siphonous
type: Concept
definition: Tubular structure with multinucleate cells without cross walls except when reproductive bodies are formed.
note: Lee (2008), Phycology.
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Sporophyte Generation
type: Concept
definition: The diploid generation (phase) in a plant's life-cycle that produces spores [based upon the Greek, sporo (spore) & -phyte (plant)].
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Generation Type
created: 2017-07-28 10:34:38
modified: 2018-06-28 13:07:18

Spring
type: Concept
definition: The thallus can be observed in spring.
in scheme: Macroalgae Traits
broader: Thallus Seasonality
created: 2017-10-09 15:16:08

Sub-canopy
type: Concept
definition: A thallus forming a secondary cover, usually of 20 cm height maximum.
in scheme: Macroalgae Traits
broader: Thallus Vertical Space Used
created: 2017-10-09 15:40:31

Summer
type: Concept
definition: The thallus can be observed in summer.
note: M. Robuchon (pers. comm.)
in scheme: Macroalgae Traits
broader: Thallus Seasonality
created: 2017-10-09 15:16:08

Surface Area
type: Concept
definition: The total area that the surface of the thallus occupies. Surface area estimation methods involving colorimetry, image analysis and physical measurement of leaf area.
note: Armstrong et al., 2003
in scheme: Macroalgae Traits
broader: Thallus Size
created: 2017-11-29 11:38:56

Surface Area-Volume Ratio
type: Concept
alternative label: SA-V
definition: The ratio between the surface area and volume of an organism.
note: Hurd et al., 2014
in scheme: Macroalgae Traits
broader: Thallus Size
created: 2017-07-27 15:12:31
modified: 2017-11-29 11:38:28

Survival Strategies
type: Concept
definition: Adaptive features of function, structure and reproduction that enhance growth and survival.
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Life History Trait
created: 2017-08-18 10:30:47
modified: 2018-06-28 13:05:42

Terete
type: Concept
definition: Cylindrical thallus, round in cross-section.
note: Sue Hiscock (1986), A field key to the British red seaweeds (Rhodophyta).
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12
modified: 2017-07-05 12:27:32

Tetrasporophyte Generation
type: Concept
definition: In red algae, the diploid generation responsible for producing tetraspores [based upon the Greek, tetras (four), sporo (seed) & phyton (a plant)].
note: Guiry M.D. and Guiry G.M., 2018
in scheme: Macroalgae Traits
broader: Generation Type
created: 2017-07-28 10:34:38
modified: 2018-06-28 13:07:35

Thallus Dry Weight
type: Concept
definition: The weight or mass of organic matter after removal of water by heating to constant weight.
in scheme: Macroalgae Traits
broader: Thallus Weight
created: 2017-10-10 14:34:33
modified: 2018-06-28 13:11:06

Thallus Fresh Weight
type: Concept
definition: The weight of the thallus after it was washed with tapper water and dried gently with soft paper towel to remove any free surface moisture.
in scheme: Macroalgae Traits
broader: Thallus Weight
related match: TO_0000442
created: 2017-07-11 12:05:52
modified: 2018-06-28 13:11:23

Thallus Life Cycle
type: Concept
definition: The sequence of nuclear and morphological phases of the thallus.
in scheme: Macroalgae Traits
broader: Phenological Trait
narrower: Digenetic
narrower: Monogenetic
narrower: Trigenetic
created: 2017-07-11 12:05:52
modified: 2018-06-28 12:43:51

Thallus Life Span
type: Concept
definition: The structural features, the resting stage nature and duration of life of seaweeds, resulting from the interaction of all life processes, both genetic and environmental.
in scheme: Macroalgae Traits
broader: Phenological Trait
narrower: Annual
narrower: Ephemeral
narrower: Long Perennial
narrower: Perennial
narrower: Pseudoperennial
narrower: Seasonal Annual
narrower: Short Perennial
created: 2017-07-27 15:28:09
modified: 2018-03-17 18:13:26

Thallus Seasonality
type: Concept
definition: The occurring season of a species.
in scheme: Macroalgae Traits
broader: Phenological Trait
narrower: Autumn
narrower: Spring
narrower: Summer
narrower: Winter
created: 2017-10-09 15:12:24
modified: 2018-06-28 12:51:29

Thallus Shape
type: Concept
definition: The approximate 3 dimensional shape of a thallus.
in scheme: Macroalgae Traits
broader: Morphological Trait
narrower: Branched
narrower: Compressed
narrower: Crustose
narrower: Dendroid
narrower: Discoid
narrower: Encrusting
narrower: Erect
narrower: Filamentous
narrower: Flat
narrower: Foliose
narrower: Globose
narrower: Lanceolate
narrower: Monosiphonous
narrower: Pinnate
narrower: Polysophonous
narrower: Prostrate
narrower: Siphonous
narrower: Terete
narrower: Tubular
created: 2017-08-31 11:14:09
modified: 2018-06-28 13:08:48

Thallus Size
type: Concept
definition: Morphological characteristic, easy to measure, related to the overall physical magnitude of an organism, comparable across taxa and extremely variable through time and space.
note: Schmidt et al. 2006 doi:10.1016/j.earscirev.2006.05.004
in scheme: Macroalgae Traits
broader: Morphological Trait
narrower: Maximum Thallus Diameter
narrower: Maximum Thallus Length
narrower: Surface Area
narrower: Surface Area-Volume Ratio
narrower: Thallus Volume
narrower: Thallus Weight
created: 2017-08-31 11:14:09
modified: 2018-06-28 13:09:46

Thallus Texture
type: Concept
definition: The tactile surface characteristics and appearance of a thallus.
in scheme: Macroalgae Traits
broader: Morphological Trait
narrower: Calcareus
narrower: Cartilagineous
narrower: Fleshy
narrower: Gelatinous
narrower: Leathery
narrower: Membranous
created: 2017-08-31 11:14:09
modified: 2018-06-28 13:12:07

Thallus Vertical Space Used
type: Concept
definition: The vertical projection of the thallus relative to the substrate.
in scheme: Macroalgae Traits
broader: Morphological Trait
narrower: Canopy
narrower: Encrusting
narrower: Epiphyte
narrower: Sub-canopy
narrower: Turf
created: 2017-10-09 15:27:51
modified: 2018-06-28 13:13:24

Thallus Volume
type: Concept
alternative label: TV
definition: The volume (in millilitres) of an algal thallus measured by placing the alga in water and determining the volume of water displaced.
note: Hacker and Steneck, 1990
in scheme: Macroalgae Traits
broader: Thallus Size
created: 2017-07-05 14:39:48
modified: 2017-11-29 11:35:03

Thallus Weight
type: Concept
definition: Any measurable characteristic related to the thallus weight.
in scheme: Macroalgae Traits
broader: Thallus Size
narrower: Thallus Dry Weight
narrower: Thallus Fresh Weight
narrower: Thallus Wet Weight
created: 2017-11-29 11:41:29

Thallus Wet Weight
type: Concept
definition: The weight of the thallus obtained after external fluid removal on filter paper.
in scheme: Macroalgae Traits
broader: Thallus Weight
created: 2018-02-12 11:49:46
modified: 2018-06-28 13:11:44

Tissue C/N Ratio
type: Concept
definition: The ratio between Carbon and Nitrogen contained in plant tissues.
note: Hurd et al., 2014
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2017-07-27 15:12:31
modified: 2018-02-23 15:26:16

Tissue N:P Ratio
type: Concept
definition: The ratio between Nitrogen and Phosphorus contained in plant tissues.
note: Hurd et al (2014)
in scheme: Macroalgae Traits
broader: Physiological Trait
created: 2019-04-01 11:22:15
modified: 2019-04-01 11:22:40

Total biomass
type: Concept
definition: The amount of living matter in an area.
note: Guiry M.D. and Guiry G.M., 2018 doi:
scope note: g/m2
in scheme: Macroalgae Traits
broader: Demographic Trait
created: 2017-07-11 12:05:52
modified: 2017-08-31 11:29:19

Trait
type: Concept
definition: Any measurable or observable characteristic of an organism.
in scheme: Macroalgae Traits
narrower: Macroalgae Trait
created: 2017-11-29 10:20:27

Trigenetic
type: Concept
definition: In florideophycean red algae, a morphological life history with three types of morphological generations (gametophyte, carposporophyte & tetrasporophyte) and two cytological phases (diploid & haploid).
note: Guiry M.D. and Guiry G.M., 2018.
in scheme: Macroalgae Traits
broader: Thallus Life Cycle
created: 2017-07-27 15:31:54
modified: 2017-07-27 15:37:01

Tubular
type: Concept
definition: Macroscopic thalli consisting of 1- or few-layered hollow tubes.
note: Balata et al., 2011
in scheme: Macroalgae Traits
broader: Thallus Shape
created: 2017-05-25 14:01:12

Turf
type: Concept
definition: Primary space holders with limited vertical height, usually ~ 5 cm height.
in scheme: Macroalgae Traits
broader: Thallus Vertical Space Used
created: 2017-10-09 15:40:31

Winter
type: Concept
definition: The thallus can be observed in winter.
in scheme: Macroalgae Traits
broader: Thallus Seasonality
created: 2017-10-09 15:16:08