most of the primary production occurs in the mixed layer in an ocean ecosystem.
most of the primary production occurs in the mixed layer in an ocean ecosystem.
where does most of the primary production occur in an ocean ecosystem?
mixed layer
stream metabolism, often referred to as aquatic ecosystem metabolism in both freshwater (lakes, rivers, wetlands, streams, reservoirs) and marine ecosystems, includes gross primary productivity (gpp) and ecosystem respiration (er) and can be expressed as net ecosystem production (nep = gpp - er). analogous to metabolism within an individual organism, stream metabolism represents how energy is created (primary production) and used (respiration) within an aquatic ecosystem. in heterotrophic ecosystems, gpp:er is <1 (ecosystem using more energy than it is creating); in autotrophic ecosystems it is 1 (ecosystem creating more energy than it is using). most streams are heterotrophic. a heterotrophic ecosystem often means that allochthonous (coming from outside the ecosystem) inputs of organic matter, such as leaves or debris fuel ecosystem respiration rates, resulting in respiration greater than production within the ecosystem. however, autochthonous (coming from within the ecosystem) pathways also remain important to metabolism in heterotrophic ecosystems. in an autotrophic ecosystem, conversely, primary production (by algae, macrophytes) exceeds respiration, meaning that ecosystem is producing more organic carbon than it is respiring.
stream metabolism
bullet::::- longkou huangshuihekou ocean ecosystem national special marine protected area









































bullet::::- weihai liugongdao ocean ecosystem national special marine protected area +i









































bullet::::- yantai zhifudao island group national special marine protected area









































bullet::::- rushan tadaowan ocean ecosystem national special marine protected area









































bullet::::- yantai muping sandy coast national special marine protected area









































bullet::::- laiyang wulonghekou littoral wetland national special marine protected area









































bullet::::- haiyang wanmi haitan ocean resources national special marine protected area









































bullet::::- weihai xiaoshidao national special marine protected area









































bullet::::- laizhou qiantan ocean ecosystem national special marine protected area ("alt." laizhou shoal)
list of protected areas of china