Marine Glossary - DCU

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compensation point compound compressed concave conceptacle congener conjugation conservation conservation biology conservation covenant contamination convergent evolution convex corridor cortex cortical COSEWIC (Committee on the Status of Endangered Wildlife in Canada) cosmopolitan with each other. Communities are often defined by a dominant species (e.g. kelp forest community) or the major physical characteristics of the area (e.g. mud flats). conditions where respiration is in balance with photosynthesis, with generally no net gas exchange, in algae usually related to habitat depth having multiple parts or branches, not simple flattened saucer-shaped, with surface that curves inward cavity or chamber containing reproductive structures with opening to the surface for release, e.g. in Corallinales and Fucales A term in chemistry that refers to one of many variants or configurations of a common chemical structure. Although similar, congeners may have different toxicological properties and fates in the environment. special form of isogamy where the reproductive protoplasts of two organisms form a common tube and fuse together, e.g. in Zygnemataceae The protection of wild species and their ecosystems. A field of science that deals with threats to biodiversity. The goals of conservation biology are to investigate human impacts of biodiversity and to develop approaches to prevent extinction through stewardship of entire biological communities. A legal agreement that specifies the ways in which a piece of land can be used. A conservation covenant is incorporated into the land deed and protects the land in perpetuity. Substances, including those found naturally, that are present at concentrations above natural background levels, or whose distribution in the environment has been altered by human activity. The development of similar structures in organisms that do not share recent common ancestor (e.g. eyes of squid and humans). Compare divergent evolution; see also evolution. having surface that curves outward An area of intact habitat that allows wildlife to move in relative safety from one place to another. tissue lying between the epidermis layer and the central medulla tissue relating to the cortex A national committee of experts that assesses and designates which wild species are in some danger of disappearing from Canada. found in many parts of the world
costate cover cells critically endangered crosswall cruciate cryptic colouration cryptostoma cuneate cuticle cystocarp cystocarpic cytokinesis ribbed sterile cells cut off from during the formation of tetrasporangia in Rhodophyta IUCN classification for a species for which the best available evidence shows that it is facing an extremely high risk of extinction in the wild. end wall of a cell in a filament generally cross-shaped; in the Rhodophyta, the type of division where tetrasporangium divides in two planes at right angles to each other To protect themselves against predators, many animals acquire colouring and markings to match and conceal them in their usual surroundings. For example the nudibranch (sea slug), Rostanga pulchra, is practically indiscernible from the red sponges on which it lays its eggs. cavity open to surface that contains hairs or pariphyses, e.g. in Fucales wedge shaped, triangular with acute angle downward structureless layer on outer surface of some plants the carposporophyte and surrounding envelop of haploid (1N) female gametophyte tissue (or pericarp) in the Rhodophyta bearing cystocarps, signaling a fertilized female gametophyte in the Rhodophyta process of cell division, as opposed to nuclear division D decomposer decomposition desmid detritus detrivore diatom diatomaceous earth An organism which gains energy by breaking down the final remains of living things. Predominantly bacteria and fungi, decomposers are important in freeing the last of minerals and nutrients from organics and recycling them back into the food web. See also decomposition; compare detrivore. The biochemical process where biological materials are broken down into smaller particles and eventually into basic chemical compounds and elements. See also decomposer. green algae that have conjugation of non-flagellate, amoeboid gametes Dead organic matter of plant or animal. See also detrivore. An organism that feeds on large bits of dead and decaying organic matter. What detrivores leave behind is used by decomposers. Crabs and seabirds are examples of detrivores. Compare decomposer; see also detritus. member of Bacillariophyceae siliceous geological deposits made up of diatom frustules
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Page 9 and 10: ecosystem diversity ecotourism ecot
Page 11 and 12: facultative fecal coliform bacteria
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Page 17 and 18: MDF mean trophic level medulla meio
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Page 27 and 28: U unilocular upland urban sprawl ut

Marine Glossary - DCU

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