Climate change is expected to affect resource-consumer interactions underlying stability in polar food webs. Polar benthic organisms have adapted to the marked seasonality characterising their habitats by concentrating foraging and reproductive activity in summer months, when inputs from sympagic and pelagic producers increase. While this enables the persistence of biodiverse food webs, the mec...

Oxygen deficiency in the near-bottom water associated with eutrophication has been shown to have negative impacts on marine benthos in many Scandinavian waters. In the present study, the benthic fauna and the sedimentary habitat have been studied between 7 and 34 m depth; at 14 stations in three Swedish fjords in four different years, and at 12 stations along the Swedish coast in three differen...

Rapid changes in biodiversity are occurring globally, yet the ecological impacts of diversity loss are poorly understood. Here we use data from marine invertebrate communities to parameterize models that predict how extinctions will affect sediment bioturbation, a process vital to the persistence of aquatic communities. We show that species extinction is generally expected to reduce bioturbatio...

Introduction Conclusions References

Climate warming can trigger abrupt ecosystem changes in the Arctic. Despite the considerable interest in characterizing and understanding the ecological impact of rapid climate warming in the Arctic, few long time series exist that allow addressing these research goals. During a 30-y period (1980-2010) of gradually increasing seawater temperature and decreasing sea ice cover in Svalbard, we doc...

page 373 Fish brains re ̄ect an enormous evolutionary radiation 374 Based on morphology: how conclusions on sensory orientation are reached 376 Structure of ®sh brains 378 Large-scale evolutionary patterns of ®sh brains 384 Functional diversi®cation 386 Cyprinidae Gadidae Flat®shes Cichlidae and other modern perciforms How environments shape brains: turbidity, benthos and the pelagic realms 393 ...

The objective of this study was to establish the rate at which predatory leeches consume tubificid worms, at worm population densities simulating those of Cleveland Harbor. Two common species of leeches from Lake Erie were studied, Helobdella stagnalis and Erpobdella punctata. A mixed population of tubificids, mostly Limnodrilus hojfmeisteri, Limnodrilus cervix and Peloscolex multisetosus were ...

Abstract The living and dead fauna of Valencia Seamount, a deep promontory in the middle Balearic Basin which summit is at ca. 1100 m depth, described by first time based rock dredge perfomed sedimentary area Mount. Surface-feeder polychaetes (the Paraonidae Levinsenia gracilis Terebellidae as dominant), taxodont bivalves ( Ledella messanensis Yoldiella ovulum ) were main species benthos. We fo...

The article focuses on studying the species composition and abundance of macrozoobenthos in overhaul area a large road facility that includes assembling new culverts, northern taiga streams being taken as examples. There were surveyed six small forest watercourses taking water from swamps belong to Chirka-Kem river basin. Four quantitative samples (area = 0.02 m2) each watercourse, one sample w...

Co-occurrence of mature larvae and male pharate pupae in benthos samples from the Loire River enabled descriptions of the larva of Homilia leucophaea. Using characters of the head capsule, the labrum, the meso- and metanotum, and the pro- and metathoracic legs, we compared H. leucophaea with larvae of six western European Athripsodes species, including a larval key to these species. The larva o...