Define macroinvertebrate. Macroinvertebrate synonyms, macroinvertebrate pronunciation, macroinvertebrate translation, English dictionary definition of macroinvertebrate. A macroscopic invertebrate, especially an aquatic organism such as a crustacean, a mollusk, or an aquatic insect. Macroinvertebrate - definition of macroinvertebrate by The.
Aquaculture is a necessary part of the quest for solutions for sustainable growth, food security and environmental stewardship. This applies at global level, and is particularly understood in the EU. As such, it embodies Blue Growth and IMP policy, and is one of the RIS3 pillars across EU Atlantic regions. However, EU aquaculture, despite its quality and environmental standards, is stagnant. One of the main challenges is the rising cost and volatility of fish feeds, which significantly reduces the competitiveness and resilience of ventures, mainly led by SMEs.
Littoral Zone
J.A. Peters, D.M. Lodge, in Encyclopedia of Inland Waters, 2009
Invertebrates
Invertebrates are very diverse, and include: zooplankton, crayfish, insects, worms, and leeches. Invertebrates living on the bottom of lakes are referred to as zoobenthos, and are far more abundant and diverse in the littoral zone than in other lake zones. Therefore the ratio of the abundance of zoobenthos to zooplankton is inversely related to lake size. However, the absolute diversity and abundance of zoobenthos increases with lake size. Invertebrate diversity is also positively related to habitat complexity, macrophyte abundance, conductivity, and the presence of stream connections.
Habitat availability within the littoral zone influences the type of invertebrates that will colonize (Figure 2). For instance, ephemeroptera (mayflies) and plecoptera (stoneflies) generally prefer substrates that have higher wave action and coarser substrates, while lightly disturbed fine sediments are colonized by chironomids (midge larvae), bivalves (clams), and oligochaetes (worms). Substrate, macrophyte abundance, and detritus are the three main factors controlling the diversity and distribution of invertebrates, but water depth, wave exposure, and water clarity, (which influence the first three main factors) may consequently also affect invertebrate abundance and distribution.
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