Results 61 to 70 of about 4,160,848 (334)
Change in nematode infestation in stomachs of Grey Seals caught at the breeding ground at Froan on the coast of Sør-Trøndelag county, Norway, is recorded. The abundance of nematodes decreased from 1977/78 to 1982/84. In the first period more than 50% of
Øystein Wiig
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Dynamic Ecological System Analysis
This article develops a new mathematical method for holistic analysis of nonlinear dynamic compartmental systems through the system decomposition theory.
Coskun, Huseyin
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Dynamics of sympatric vole populations: influence of interspecific competition
We conducted removal experiments in open populations of Microtus ochrogaster and M. pennsylvanicus to test for potential interspecific competition between coexisting populations in bluegrass and tallgrass prairie in east-central IL, USA. Population densities of M. ochrogaster and M.
Getz, L L +4 more
openaire +1 more source
Seasonal variation of birds on a feeding site in a suburban area near Oslo, Norway
The birds visiting a feeding site near a villa in a suburban, residential area in Bærum municipality, west of Oslo, were monitored daily during 1997 - 99, and at irregular intervals during 1993 - 96. Sixteen species had a frequency of more than one week
Kåre Elgmork
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A review of the feeding and reproduction of Greenland right Balaena mysticetus, Blue Balaenoptera musculus, Fin Balaenoptera physalus, Sei Balaenoptera borealis, Humpback Megaptera novaeangliae and Sperm whales Physeter macrocephalus in Norwegian and ...
Ivar Christensen, Nils Øien, Tore Haug
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Species assembly in model ecosystems, I: Analysis of the population model and the invasion dynamics [PDF]
Recently we have introduced a simplified model of ecosystem assembly (Capitan et al., 2009) for which we are able to map out all assembly pathways generated by external invasions in an exact manner. In this paper we provide a deeper analysis of the model,
Alonso +46 more
core +7 more sources
Interspecific differences in environmental response blur trait dynamics in classic statistical analyses [PDF]
Trait-based ecology strives to better understand how species, through their bio-ecological traits, respond to environmental changes, and influence ecosystem functioning. Identifying which traits are most responsive to environmental changes can provide insight for understanding community structuring and developing sustainable management practices ...
Mclean, Matthew +4 more
openaire +3 more sources
In the 1820’s, a relatively large harbour seal population may have inhabited the Tana River Estuary. Due to heavy persecution, especially in the 1920’s and 1930’s, it was reduced dramatically, and today there are probably less than 40 individuals left ...
Gunnar Henriksen, Kjell Moen
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Comparative analysis of chloroplast genomes from 14 genera of Thymelaeaceae revealed variation in gene content, ranging from 128 to 142 genes, primarily influenced by IR expansion/contraction events and pseudogenization of ndhF, ndhI, and ndhG. Two large inversions were detected within the large single‐copy region, including a synapomorphic inversion ...
Abdullah +8 more
wiley +1 more source
Weed management in grain legumes using an intercropping approach [PDF]
Grain legumes benefit the farming system via symbiotic N2 fixation and subsequent residue incorporation contributing to soil fertility together with their effect as break-crop in cereal rich rotations.
Hauggaard-Nielsen, Henrik +1 more
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