Marine Glossary - DCU

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allele alloparasite alternate amorphous amyloplast anadromous anaerobic anisogamy anterior antheridium apical apogamy apomeiosis aquaculture arcuate articulated autotroph autotrophic auxiliary cell axis called introduced, non-native, exotic and invasive species. One of the alternative forms of a particular gene. Each gene is comprised of two alleles, one inherited from the father and one from the mother. However, within a population, many alleles may exist for one gene. Hair colour in humans is a great example! See also genes. parasite not related to its host branched at different levels on opposite sides of main axis lacking definite structure or shape colorless organelle related to starch production Fish that must ascend rivers and streams from the sea in order to breed. living without free oxygen, in a reducing atmosphere reproduction by motile gametes that differ in morphology or behavor in front, or toward the front cell that produces motile male gamete at or near the apex or top, distal development of an organism without gamete fusion (fertilization) nuclear division without meiosis The controlled cultivation and harvest of aquatic animals or plants, such as finfish (e.g., salmon), shellfish (e.g., clams, oysters), and edible seaweeds. curved like a bow, crescent-shaped jointed or segmented, e.g. Calliarthron or Halimeda An organism that synthesizes organic molecules from inorganic starting materials through photosynthesis or chemosynthesis. Autotrophs are ecologically important as primary producers as they ultimately provide energy for all heterotrophic organisms. See also chemosynthesis, photosynthesis; compare heteroptroph. capable of producing its own food cell in post-fertilization development in the Rhodophyta which receives the diploid (2N) zygote nucleus and then develops the gonimoblast filaments main stem or central line of development on which secondary or side branches are borne B ballast water Water carried by a ship to improve its stability when it is lightly loaded. It is normally discharged into
asal baseline thematic mapping (BTM) basipetal bathymetry bathypelagic zone benthic benthic benthic biaxial biflagellate bifurcate bilateral bioaccumulation bioaccumulation biodiversity biodiversity biogeoclimatic ecosystem classification (BEC) biological controls biological oxygen demand (BOD) the ocean when the ship is loaded with cargo. near point of attachment to substratum A digital integration of satellite imagery and land-use, land-cover, and topographic data to produce an “image map” with contour lines and vector planimetry information. in direction from apex to base The depth of water in the ocean as it relates to the topography or features of the ocean floor. The zone of the ocean that extends from 1000m to 4000m below the surface of the ocean. Visit the Bathypelagic Zone on OceanLink for pictures and cool facts about life at this depth. Organisms that live on or in the sediment at the bottom of aquatic ecosystems such as lakes, rivers, and the ocean. attached to substratum, not planktonic Refers to organisms that live on or in the ocean bed. Benthic epifauna are organisms that live on the ocean floor or upon bottom objects sch as sea anemones and barnacles, whereas benthic infauna are organisms that live within the surface sediments such as clams and worms. Compare pelagic. having two axial cell rows having two flagella divided into two parts, forked having two sides An increase in the concentration of a chemical in a biological organism over time, compared to the chemical’s concentration in the environment. Compounds accumulate in living things if they are taken up and stored faster than they are broken down or excreted. The process whereby pollutants are taken up, retained and concentrated in the cells of plants and animals. The variety and abundance of life, including ecosystems, communities, and the genetic composition of species. Also called biological diversity. The variation in life on Earth reflected at all levels, from various ecosystems and species, to the genetic variation within a species. See also ecosystem diversity, species diversity, genetic diversity. A classification system in British Columbia that distinguishes terrestrial zones based on climate, soils, and dominant vegetation. Using natural enemies of a particular species, usually predators and pathogens, to control population. A measure of the amount of oxygen required for bacteria to break down organic matter (e.g., sewage
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Page 27 and 28: U unilocular upland urban sprawl ut

Marine Glossary - DCU

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