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Displaying 446 - 450 of 1605Macroinvertebrate assemblages of peatland lakes: Assessment of conservation value with respect to anthropogenic land-cover change
Small blanket bog lakes can contain many rare and threatened aquatic invertebrate species. Their conservation value, however, is threatened throughout Europe by peat extraction and particularly conifer afforestation, which can compromise the physico-chemical habitat quality of peatland lakes through excessive inputs of forestry-derived dissolved and particulate substances.
Macrophytes in shallow lakes: Relationships with water, sediment and watershed characteristics
We examined macrophyte–environment relationships in shallow lakes located within the Prairie Parkland and Laurentian Mixed Forest provinces of Minnesota. Environmental variables included land cover within lake watersheds, and within-lake, water and sediment characteristics. CCA indicated that sediment fraction smaller than 63μm (f
Curiosity killed the bat: Domestic cats as bat predators
Domestic cats are suspected to have an impact on wild populations of birds and small mammals, but published reports of predation on bats are either rare or anecdotal. We based our study on 1012 records of bats admitted at four wildlife rescue centres in peninsular Italy in 2009–2011.
Rangeland management impacts on the properties of clayey soils along grazing gradients in the semi-arid grassland biome of South Africa
The grassland biome of South Africa is a major resource for livestock farming; yet the soils of these rangelands are stressed differently by various management systems. The aim of this study was to investigate how basic soil properties respond to different management systems. For this purpose we sampled rangeland management systems under communal (continuous grazing), commercial (rotational grazing) and land reform (mixture of grazing systems) farming.
productivity of traditional rice–fish co-culture can be increased without increasing nitrogen loss to the environment
Although the traditional rice–fish co-culture system (RF) efficiently uses water and land resources, provides food security, and does not harm the local environment, it requires improvement because of its small scale and low fish yield. We therefore determined whether fish yield in RF can be increased without increasing nitrogen (N) loss into the environment (i.e., the risk of N pollution) by management of N inputs.