The study concerns the kinetics of cellular proliferation in the different cell populations of the normal and regenerating rat liver. A detailed analysis is presented, which includes techniques of in vivo labeling of DNA with tritiated thymidine and high-resolution radioautography, of the temporal and spatial patterns of DNA synthesis and cell division in the parenchymal cells, littoral cells, ...

The continuous increase in the number of reservoirs globally has raised important questions about the environmental impact of their greenhouse gases emissions. In particular, the littoral zone may be a hotspot for production of greenhouse gases. We investigated the spatiotemporal variation of CO2 flux at the littoral zone of a Chinese reservoir along a wet-to-dry transect from permanently flood...

Understanding how a monophyletic lineage of a species diverges into several adaptive forms has received increased attention in recent years, but the underlying mechanisms in this process are still under debate. Postglacial fishes are excellent model organisms for exploring this process, especially the initial stages of ecological speciation, as postglacial lakes represent replicated discrete en...

Tourists can adversely influence the ecology of oligotrophic lakes by increasing algal production via direct nutrient inputs and/or re-suspension of sediments. To assess the influence of tourists on food web dynamics, we used natural abundance stable isotopes of carbon and nitrogen to calculate the relative importance of autochthonous and allochthonous carbon sources to littoral zone food webs ...

Costa da Caparica, located south of Lisbon, has been since the 1960s favourite beach population Portuguese capital. The bridge over Tagus river (1966), connecting two margins, facilitated access to that wide sand and dunes. Due its natural features proximity Caparica become a highly populated area, where different social economic activities compete for use available space, increasing pressure u...

This work aims to characterize the morphosedimentaty dynamics of shores Al-Hoceima Bay through geochemical and mineralogical analysis surface sediments. The results reveal a direct relationship between marine hydrodynamic forcing on one hand detrital inputs from land other. Calcimetric makes it possible highlight transport deposition processes at beaches bay. difference in reasonably high carbo...