Biological studies of Spanish meromictic and stratified lakes
1992
Miracle, Maria Rosa | Vicente, Eduardo | Pedrós-Alió, Carlos
19 pages, 6 figures, 1 table
اظهر المزيد [+] اقل [-]Surveys have been carried out in over 40 lakes in the Pre-Pyrenees, Cuenca mountains and Banyoles karstic areas in Spain. About 18 of these lakes are deep enough to become stratified and have been studied in more detail. Here we discuss the vertical distribution and species composition of their planktonic communities, and their relationship to physico-chemical parameters. Meromictic and stratified karstic lakes are characterized by the large accumulations of organisms at the redoxcline. Sharp gradients of oxygen and reduced compounds are found in this region as a consequence of the activities of the organisms. Different organisms form abundance maxima at their preferred depths further contributing to the stratification. Special attention is given to these communities at the oxic-anoxic interface. Usually, rotifers accumulate in the microaerophilic zone. Algae may be found at the zero oxygen depth. Phototrophic anaerobic bacteria are found underneath when enough light reaches the interface. Different communities of ciliates appear in the aerobic waters, in the oxycline and in the anaerobic waters respectively
اظهر المزيد [+] اقل [-]Peer reviewed
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Instituto de Ciencias del Mar