tailieunhanh - OCEANOGRAPHY and MARINE BIOLOGY: AN ANNUAL REVIEW (Volume 45) - Chapter 3

Mysids thường chiếm ưu thế epifaunas đáy điện thoại di động của thềm lục địa giữa vĩ độ. Macquart-Moulin Ribera Maycas (1995) báo cáo rằng trong sáu loài phong phú nhất trên kệ phía tây và miền nam châu Âu là tất cả các migrators diel mạnh mẽ. Công bố ban ngày epibenthic tạ (kéo xe) dữ liệu từ khu vực lướt sóng cạnh hạn sử dụng phù hợp với công bố dữ liệu hành vi trên các loài phong phú nhất được sử dụng để kiểm tra, xác nhận và mở rộng mối quan hệ với các khu vực. | HABITAT COUPLING BY MID-LATITUDE SUBTIDAL MARINE MYSIDS IMPORT-SUBSIDISED OMNIVORES PETER A. JUMARS School of Marine Sciences Darling Marine Center University of Maine 193 Clark s Cove Road Walpole Maine 04573 . E-mail jumars@ Abstract Mysids often dominate mobile benthic epifaunas of mid-latitude continental shelves. Macquart-Moulin Ribera Maycas 1995 reported that the six most abundant species on western and southern European shelves are all strong diel migrators. Published daytime epibenthic sledge sled data from the surf zone to the shelf edge matched with published behavioural data on the most abundant species were used to test confirm and extend that relationship to other coastal regions and to identify an association of abundant migrators with species that are important in fish diets. They also reveal another pattern a correspondence between abundant surf-zone species and species that dominate estuarine faunas seasonally. Population concentrations at estuary mouths sills of fjords and in the surf zone suggest a lifestyle dependent upon horizontal fluxes. Marine mysids that migrate between habitats are chronically undersampled in the field however and are underrepresented in food-web models. Unfortunately no single methodology samples both pelagic and benthic individuals well and nearly all shelf measurements so far reported must be considered underestimates of local abundance. Mysids are major dietary components for many benthic and pelagic fishes mammals cephalopods and decapods often for key life stages and often because mysid migrations result in encounters with predators. Mysids can be extraordinarily omnivorous with demonstrated capabilities to digest cellulose and diets spanning macrophyte detritus more labile detritus large microalgae and smaller animals and heterotrophic protists. They can be sufficiently abundant and active to play roles in sediment transport. Contributing factors to their underappreciation have been the lack of fidelity