Annales de Limnologie - International Journal of Limnology

Temperature (16, 20, 24 and 28 °C) affected significantly average lifespan (LS), life expectancy at hatching (e₀), generation time (T), net reproductive rate (R₀), intrinsic rate of population increase (r_m) and population growth rate of A. brightwelli, prey (B. angularis) density (10, 20, 30 and 40 ind. ml^-1) affected the values of T, R₀, r_m and r, and their interaction affected the values of T and r. In natural water bodies, the dynamics patterns of A. brightwelli population, and then the community structure and the functioning of ecosystems will be changed by climate changes.

Macrophyte richness of artificial and natural water bodies covering rivers, streams, canals and habitats with standing water was studied in Pannonian and Carpathian regions (Central Europe). Total number of macrophytes was significantly (P<0.05) higher in artificial water bodies compared to natural aquatic habitats in both regions. Hydrological variables followed by chemical and landscape factors were identified by generalised linear model (GLM) as the underlying sources of variation in macrophyte species richness.

Low population growth and high survivorship for B. calyciflorus sibling species BNA13, vice versa for sibling species BNB3. Some adaptations of them in tropical shallow lakes to water temperatures and trophic levels were similar, and they have the potential for coexistence in single waterbody of higher temperature and higher trophic level.

* We examined abundances of selected microorganisms and seasonal distribution patterns of viral, microbial and planktonic communities in Sidi Salem reservoir.

* Picocyanobacteria abundances were higher in the euphotic strate and decrease with depth.

* The vertical distributions of heterotrophic bacteria showed important fluctuations during the period of study. This community was characterized by a clear separation between High DNA and Low DNA content populations.

* The VLP community was highly dynamic during the period of monitoring.

Despite the fact that all the ponds were situated within an urban landscape, the type of direct surroundings (trees vs. meadows) and fish presence were the strongest determinants of zooplankton distribution. The microhabitat mosaic led to high zooplankton diversity regardless of the anthropogenic pollution and unfavourable conditions in the spring season the.

In this manuscript we show the importance of the environmental integrity in tropical streams in mayflies (Leptophlebiidae), will lead to a loss of species and a decline in the abundance, in addition to a change in species composition, and the dynamics of populations. On average, a reduction of 0.1 in the value of the HII led to the loss of five specimens and one species. The composition of the communities varied systematically along the environmental gradient, with more sensitive species being found only when the index was above a threshold of 0.6. The importance of the riparian vegetation for the aquatic biota, especially its role in the mitigation of impacts from the surrounding matrix, supports the universal conservation of this type of habitat.

・ The long-term increase in diatom abundance and the shift of blooming season were detected in Lake Kasumigaura, Japan.

・ Model simulation suggested that Si release from resuspended sediments caused the increase.

・ The degradation of light condition due to resuspension probably affected the shift of blooming season.