Oikos

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The more polluted the environment, the more important biodiversity is for food web stability
Oikos - Tập 122 Số 8 - Trang 1247-1253 - 2013
Leslie Garay‐Narváez, Matı́as Arim, José D. Flores, Rodrigo Ramos‐Jiliberto
Human activities have led to massive influxes of pollutants, degrading the habitat of species and simplifying their biodiversity. However, the interaction between food web complexity, pollution and stability is still poorly understood. In this study we evaluate the effect exerted by accumulable pollutants on the relationship between complexity and stability of food webs. We built model foo...... hiện toàn bộ
Stable isotope analyses document intraguild predation in wolf spiders (Araneae: Lycosidae) and underline beneficial effects of alternative prey and microhabitat structure on intraguild prey survival
Oikos - Tập 114 Số 3 - Trang 471-478 - 2006
Silke Rickers, Reinhard Langel, Stefan Scheu
Intraguild predation (IGP) is common among generalist predators and an important issue in food web theory, because IGP may destabilise communities by increasing extinction of species. Also, IGP may interfere with the effectiveness of generalist predators as biological control agents. In general, occurrence of IGP in laboratory or field studies is inferred from abundance data or direct obse...... hiện toàn bộ
Forest dynamics following eastern hemlock mortality in the southern Appalachians
Oikos - Tập 121 Số 4 - Trang 523-536 - 2012
Chelcy R. Ford, Katherine J. Elliott, Barton D. Clinton, Brian D. Kloeppel, James M. Vose
Understanding changes in community composition caused by invasive species is critical for predicting effects on ecosystem function, particularly when the invasive threatens a foundation species. Here we focus on dynamics of forest structure, composition and microclimate, and how these interact in southern Appalachian riparian forests following invasion by hemlock woolly adelgid, HWA, ... hiện toàn bộ
Bright autumn colours of deciduous trees attract aphids: nutrient retranslocation hypothesis
Oikos - Tập 99 Số 1 - Trang 184-188 - 2002
Jarmo K. Holopainen, P. Peltonen
We propose an alternative hypothesis to the handicap‐signalling hypothesis, to explain the high number of specialist aphids on tree species having bright autumn colour. Since birch aphids actively seek the first yellowing leaves for breeding in autumn, it is obvious that autumn colour of foliage does not repel migrating aphids. We suggest that aphids use bright colours as a cue to detect i...... hiện toàn bộ
Litter quality and environmental controls of home‐field advantage effects on litter decomposition
Oikos - Tập 124 Số 2 - Trang 187-195 - 2015
G. F. Veen, Grégoire T. Freschet, Alejandro Ordóñez, David A. Wardle
The ‘home‐field advantage (HFA) hypothesis’ predicts that plant litter is decomposed faster than expected in the vicinity of the plant where it originates from (i.e. its ‘home’) relative to some other location (i.e. ‘away’) because of the presence of specialized decomposers. Despite growing evidence for the widespread occurrence HFA effects, what drives HFA is not understood as its strengt...... hiện toàn bộ
Using root traits to understand temporal changes in biodiversity effects in grassland mixtures
Oikos - Tập 128 Số 2 - Trang 208-220 - 2019
Lisette M. Bakker, Liesje Mommer, Jasper van Ruijven
Biodiversity–ecosystem functioning (BEF) studies typically show that species richness enhances community biomass, but the underlying mechanisms remain debated. Here, we combine metrics from BEF research that distinguish the contribution of dominant species (selection effects, SE) from those due to positive interactions such as resource partitioning (complementarity effects, CE) with a func...... hiện toàn bộ
Seasonal, not annual precipitation drives community productivity across ecosystems
Oikos - Tập 122 Số 5 - Trang 727-738 - 2013
Todd M. P. Robinson, Kimberly J. La Pierre, Matthew A. Vadeboncoeur, Kerry Byrne, Michell L. Thomey, Samantha E. Colby
Understanding drivers of aboveground net primary production (ANPP) has long been a goal of ecology. Decades of investigation have shown total annual precipitation to be an important determinant of ANPP within and across ecosystems. Recently a few studies at individual sites have shown precipitation during specific seasons of the year can more effectively predict ANPP. Here we determined wh...... hiện toàn bộ
Estimating Fitness: A Comparison of Body Condition Indices
Oikos - Tập 77 Số 1 - Trang 61 - 1996
Elizabeth M. Jakob, Samuel D. Marshall, George W. Uetz
Integrated Screening Validates Primary Axes of Specialisation in Plants
Oikos - Tập 79 Số 2 - Trang 259 - 1997
J. P. Grime, K. Thompson, Roderick Hunt, J. G. Hodgson, J. H. C. Cornelissen, I. H. Rorison, G. A. F. Hendry, T. W. Ashenden, Andrew P. Askew, S. R. Band, R. E. Booth, C. C. Bossard, Bruce Campbell, James E Cooper, A. W. Davison, P. L. Gupta, W. Hall, D. W. Hand, M. A. Hannah, S. H. Hillier, Duncan J. Hodkinson, A. Jalili, Zhiming Liu, J. M. L. Mackey, N. Matthews, M. A. Mowforth, A. M. Neal, R. J. Reader, Kevin Reiling, W. Ross-Fraser, R. E. Spencer, F. Sutton, D. E. Tasker, P. C. Thorpe, Joel Whitehouse
Above-Ground Growth and Nutrient Use by Plants in a Subarctic Environment: Effects of Habitat, Life-Form and Species
Oikos - Tập 79 Số 2 - Trang 311 - 1997
R. Lutz Eckstein, P. Staffan Karlsson
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