- A.D. Buijse (1)
- Claus Bässler (1)
- Ulf Büntgen (1)
- Alan C. Gange (1)
- W.L.T. Densen van (1)
- Simon Egli (1)
- R.E. Grift (1)
- R. Hal van (2)
- Rune Halvorsen (1)
- Einar Heegaard (1)
- Th. Heijerman (1)
- Jacob Heilmann-Clausen (1)
- J.G. Hiddink (2)
- R. Hofstede ter (1)
- Klaus Høiland (1)
- S. Jennings (1)
- Håvard Kauserud (1)
- S. Kranenbarg (1)
- Irmgard Krisai-Greilhuber (1)
- Paul M. Kirk (1)
- M.A.M. Machiels (1)
- T.A.D. Maxwell (1)
- R. Morssinkhof (1)
- J. Noordijk (1)
- A.D. Rijnsdorp (1)
- A.P. Schaffers (1)
- Beatrice Senn-Irlet (1)
- K. Smits (1)
- K.V. Sykora (1)
- Thomas W. Kuijper (1)
Continental-scale macrofungal assemblage patterns correlate with climate, soil carbon and nitrogen deposition
Andrew, Carrie ; Halvorsen, Rune ; Heegaard, Einar ; Kuijper, Thomas W. ; Heilmann-Clausen, Jacob ; Krisai-Greilhuber, Irmgard ; Bässler, Claus ; Egli, Simon ; Gange, Alan C. ; Høiland, Klaus ; Kirk, Paul M. ; Senn-Irlet, Beatrice ; Boddy, Lynne ; Büntgen, Ulf ; Kauserud, Håvard - \ 2018
Journal of Biogeography 45 (2018)8. - ISSN 0305-0270 - p. 1942 - 1953.
assemblage - biogeography - climate - ectomycorrhizal - Europe - fungi - macroecology - saprotrophic - temporal change
Aim: Macroecological scales of species compositional trends are well documented for a variety of plant and animal groups, but remain sparse for fungi, despite their ecological importance in carbon and nutrient cycling. It is, thus, essential to understand the composition of fungal assemblages across broad geographical scales and the underlying drivers. Our overall aim was to describe these patterns for fungi across two nutritional modes (saprotrophic and ectomycorrhizal). Furthermore, we aimed to elucidate the temporal component of fruiting patterns and to relate these to soil carbon and nitrogen deposition. Location: Central and Northern Europe. Methods: A total of 4.9 million fungal fruit body observations throughout Europe, collected between 1970 and 2010, were analysed to determine the two main environmental and geographical gradients structuring fungal assemblages for two main nutritional modes, saprotrophic and ectomycorrhizal fungi. Results: Two main gradients explaining the geography of compositional patterns were identified, for each nutritional mode. Mean annual temperature (and related collinear, seasonal measures) correlated most strongly with the first gradient for both nutritional modes. Soil organic carbon was the highest correlate of the second compositional gradient for ectomycorrhizal fungi, suspected as an indicator of vegetation- and pH-related covariates. In contrast, nitrogen deposition constituted a second gradient for saprotrophic fungi, likely a proxy for anthropogenic pollution. Compositional gradients and environmental conditions correlated similarly when the data were divided into two time intervals of 1970–1990 and 1991–2010. Evidence of compositional temporal change was highest with increasing elevation and latitude. Main conclusions: Fungal assemblage patterns demonstrate clear biogeographical patterns that relate the nutritional modes to their main environmental correlates of temperature, soil organic carbon and nitrogen deposition. With respect to global change impacts, the highest rates of compositional change by time suggest targeting higher latitudes and elevations for a better understanding of fungal dynamics. We, finally, suggest further examination of the ranges and dispersal abilities of fungi to better assess responses to global change.
How climate warming impacts the distribution and abundance of two small flatfish species in the North Sea
Hal, R. van; Smits, K. ; Rijnsdorp, A.D. - \ 2010
Journal of Sea Research 64 (2010)1-2. - ISSN 1385-1101 - p. 76 - 84.
vissen - populatiedichtheid - vismigratie - klimaatverandering - noordzee - fishes - population density - fish migration - climatic change - north sea - arnoglossus-laterna walbaum - solenette buglossidium-luteum - long-term trends - marine fishes - west-coast - plaice - scaldfish - growth - sole - assemblage
Climate change, specifically temperature, affects the distribution and densities of species in marine and terrestrial ecosystems. Here, we looked at the effect of temperature during winter and spawning period on latitudinal range shifts and changes in abundance of two non-commercial North Sea fish species, solenette (Buglossidium luteum) and scaldfish (Arnoglossus laterna). Both species have increased in abundance and moved to the north since the late 1980s, coinciding with a series of mild winters. In 1996, following a very cold winter, the abundance of both species temporarily decreased as they retracted to the south. The shift in temperature affected adult habitat conditions, allowing them to immigrate into new areas where they subsequently reproduced successfully. We can conclude this because recruitment improved following the increase in abundance. The recruitment relates significantly to the higher adult stock and higher temperatures. The predictions of higher average temperatures and milder winters in the North Sea make it likely that these species will increase further in abundance and move northward. The observed increase in abundance of these small flatfish species will affect the North Sea food web and therefore commercial species, e.g. plaice, by predation on juveniles and competition for benthic food resources
How ants find each other; temporal and spatial patterns in nuptial flights
Noordijk, J. ; Morssinkhof, R. ; Boer, P. ; Schaffers, A.P. ; Heijerman, Th. ; Sykora, K.V. - \ 2008
Insectes Sociaux 55 (2008)3. - ISSN 0020-1812 - p. 266 - 273.
stenamma debile hymenoptera - formicidae - behavior - assemblage - phenology - insects - queens - field
Reproduction is a key factor in understanding population ecology and therefore species occurrence. However, patterns in reproductive behaviour for distinct ant species remain insufficiently known. In this paper strategies in mate finding are studied for six ant species (Lasius niger, Lasius umbratus, Temnothorax nylanderi, Myrmica rubra, Myrmica ruginodis, Stenamma debile) in a forest ¿ forest edge ¿ agricultural field gradient. Using window traps, we studied whether these species had a restricted nuptial flight season, displayed swarming behaviour, and whether the alates aggregated at the forest edge. The flight season was limited to one month or less for L. niger, T. nylanderi, M. rubra, M. ruginodis and S. debile. Swarming behaviour occurred in all but one (L. umbratus) species. Although none of the six species seemed to have highest nest density at the forest edge, three of them, M. rubra, M. ruginodis and S. debile, showed male aggregations there, indicating this to be the main reproduction site. This last finding could be due to a more suitable micro-climate, but most likely, edges are conspicuous land marks which are used by ants to meet mates. The behavioural patterns of ant sexuals at the forest edge can influence dispersal possibilities in fragmented landscapes, reproductive success and nest densities.
Fishing effects on energy use by North Sea fishes
Jennings, S. ; Hal, R. van; Hiddink, J.G. ; Maxwell, T.A.D. - \ 2008
Journal of Sea Research 60 (2008)1-2. - ISSN 1385-1101 - p. 74 - 88.
solenette buglossidium-luteum - body-size - long-term - community - consumption - assemblage - abundance - ecosystem - patterns - biomass
Fishing affects patterns of energy use in fish populations, as demonstrated by changes in population energy consumption and the size and age when energy demands are greatest. We compare theoretical predictions and observed patterns of energy use (expressed as the primary production required to support fish production) by North Sea fish, based on simple and widely applicable theory that links life history parameters, fishing mortality (F), trophic transfer efficiency and relationships between size and trophic level (as determined using nitrogen stable isotope analysis). For the demersal species that dominate total biomass, relationships between size and trophic level were quite consistent among years. There were large decreases in relative energy requirements of all exploited demersal populations except plaice Pleuronectes platessa during the last 3 to 4 decades. Relative energy requirements of plaice were more stable because smaller plaice, which now dominate the exploited population, feed at higher trophic levels than larger plaice. The sizes and ages when population energy demands were greatest fell with increasing fishing mortality and differences between the predicted (F = 0) and observed ages at maximum energy demand were greater in larger species. Currently, the energy demands of most species peak early in life (1¿3 years) and largely reflect patterns of recruitment, leading to a homogenisation of the trophodynamics of the fish community. The fate of energy that is no longer used by commercially exploited species is not clear, partly because of the infrequent and untargeted monitoring of species that are more resilient to fishing. However, we conducted a preliminary assessment of the energy demands of solenette Buglossidium luteum, a very abundant small flatfish in the central North Sea that has increased in abundance in recent years. The solenette's high abundance and resilience to fishing, suggests that it now requires 35% of primary production in part of the central North Sea, energy that may have supported larger species in a less heavily fished ecosystem.
Climate induced increases in species richness of marine fishes
Hiddink, J.G. ; Hofstede, R. ter - \ 2008
Global Change Biology 14 (2008)3. - ISSN 1354-1013 - p. 453 - 460.
western english-channel - north-sea - community - ecosystem - patterns - ocean - biodiversity - assemblage - dispersal - diversity
Climate change has been predicted to lead to changes in local and regional species richness through species extinctions and latitudinal ranges shifts. Here, we show that species richness of fish in the North Sea, a group of ecological and socio-economical importance, has increased over a 22-year period and that this rise is related to higher water temperatures. Over eight times more fish species displayed increased distribution ranges in the North Sea (mainly small-sized species of southerly origin) compared with those whose range decreased (primarily large and northerly species). This increase in species richness can be explained from the fact that fish species richness in general decreases with latitude. This observation confirms that the interaction between large-scale biogeographical patterns and climate change may lead to increasing species richness at temperate latitudes.
Suitable habitats for 0-group fish in rehabilitated floodplains along the lower River Rhine
Grift, R.E. ; Buijse, A.D. ; Densen, W.L.T. van; Machiels, M.A.M. ; Kranenbarg, S. ; Breteler, J.P.K. ; Backx, J.J.G.M. - \ 2003
River Research and Applications 19 (2003)4. - ISSN 1535-1459 - p. 353 - 374.
aquatische ecologie - herstel - habitats - natuurontwikkeling - uiterwaarden - waterstand - rijn - aquatic ecology - rehabilitation - nature development - river forelands - water level - river rhine - ecological rehabilitation - secondary channels - microhabitat use - stream - conservation - restoration - netherlands - assemblage - juveniles - diversity
The suitability of rehabilitated floodplains along the lower River Rhine for rheophilic cyprinids was assessed by investigating the spatial distribution of 0-group fish among, and within, three newly created secondary channels, an oxbow lake reconnected at its downstream end and several existing groyne fields. Fish were sampled during April through September 1997-1999 with seine nets and trawls and, for each sample, the habitat (physical environment) was characterized (flow, depth, substrate and inundated terrestrial vegetation). The new water bodies provide more suitable habitats for 0-group fish than the groyne fields. Their beneficial value differs, however, between reproductive guilds and depends on the morphological and hydrological conditions. Total fish density increased along a gradient of decreasing water flow whereas the proportion of rheophilic species (Barbus barbus, Gobio gobio, Leuciscus idus and Aspius aspius) decreased. Flow velocity and water depth were the most important factors determining habitat utilization. Rheophilic fish were spatially separated from eurytopic fish (e.g. Abramis brama, Rutilus rutilus and Stizostedion lucioperca). During flood events, inundated terrestrial vegetation was an important habitat for the larvae of all species. To enhance the riverine fish community, floodplain water bodies should have complex shorelines, and a high variability of flow velocities. Their slopes should be moderate to maximize the probability of terrestrial vegetation getting inundated during spring and summer. Future management of similar floodplains should focus on more diverse and accessible aquatic habitats to increase overall fish species diversity, since different types of water body clearly have complementary values