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A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Lentic ecosystems can be compared with lotic ecosystems, which involve flowing terrestrial waters such as rivers and streams. Together, these two ecosystems are examples of freshwater ecosystems. Lentic systems are diverse, ranging from a small, temporary rainwater pool a few inches deep to Lake Baikal, which has a maximum depth of 1642 m. [2]
Microorganisms have key roles in carbon and nutrient cycling, animal (including human) and plant health, agriculture and the global food web. Microorganisms live in all environments on Earth that are occupied by macroscopic organisms, and they are the sole life forms in other environments, such as the deep subsurface and ‘extreme’ environments.
A food pyramid and a corresponding food web, demonstrating some of the simpler patterns in a food web. A graphic representation of energy transfer between trophic layers in an ecosystem. Energy flow is the flow of energy through living things within an ecosystem. [1]
[7] [9] [10] Furthermore, the neuston provides a food source to the zooplankton migrating from deeper layers to the surface, [11] as well as to seabirds roaming over the oceans. [12] For these reasons, the neustonic community is believed to play a critical role on the structure and function of marine food webs .
Limnology (/ l ɪ m ˈ n ɒ l ə dʒ i / lim-NOL-ə-jee; from Ancient Greek λίμνη (límnē) 'lake' and -λογία 'study of') is the study of inland aquatic ecosystems. [1] The study of limnology includes aspects of the biological , chemical , physical , and geological characteristics of fresh and saline , natural and man-made bodies of ...
NOAA Great Lakes Food Web Diagrams direct Author NOAA, Great Lakes Environmental Research Laboratory: Mason, Krause, and Ulanowicz, 2002 - Modifications for Lake Ontario, 2009.
The aquatic microbial loop is a marine trophic pathway which incorporates dissolved organic carbon into the food chain.. The microbial loop describes a trophic pathway where, in aquatic systems, dissolved organic carbon (DOC) is returned to higher trophic levels via its incorporation into bacterial biomass, and then coupled with the classic food chain formed by phytoplankton-zooplankton-nekton.