Zobrazeno 1 - 10
of 172
pro vyhledávání: '"Esa Ranta"'
Publikováno v:
PLoS ONE, Vol 4, Iss 2, p e4521 (2009)
Given the recent changes in climate, there is an urgent need to understand the evolutionary ability of populations to respond to these changes.We performed individual-based simulations with different shapes of the fitness curve, different heritabilit
Externí odkaz:
https://doaj.org/article/3bbbdf05a0c14735a40f4a3e13c91e33
The theme of the book is the distribution and abundance of organisms in space and time. The core of the book lies in how local births and deaths are tied to emigration and immigration processes, and how environmental variability at different scales a
Autor:
Andreas Lindén, Jari Valkama, Pekka Helle, Patrik Byholm, Harto Lindén, Risto Tornberg, Esa Ranta
Publikováno v:
Oecologia. 171:863-872
Different prey species can vary in their significance to a particular predator. In the simplest case, the total available density or biomass of a guild of several prey species might be most relevant to the predator, but behavioural and ecological tra
Publikováno v:
Oikos. 120:1057-1064
We study the dynamics of the capercaillie, black grouse, hazel grouse and willow grouse in Kainuu game management district in northeastern Finland in the years 1989 – 2004. It appears that the 6 – 7 year periodicity that prevailed in this region
Autor:
Aleksi Lehikoinen, Jari Valkama, Esa Ranta, Hannu Pietiäinen, Pertti Saurola, Erkki Korpimäki, Patrik Byholm, Otso Huitu, Heikki Henttonen
Publikováno v:
Oecologia. 165:349-355
The ongoing climate change has improved our understanding of how climate affects the reproduction of animals. However, the interaction between food availability and climate on breeding has rarely been examined. While it has been shown that breeding o
Publikováno v:
Ecological Informatics. 5:167-172
Isolation-by-distance (IBD) is a widely used model explaining population structure and how gene flow decreases with increasing distance. It is biologically intuitive that populations which rarely exchange individuals should drift apart genetically. H
Autor:
Kai Lindström, Esa Ranta
Publikováno v:
Ethology. 92:217-226
Juveniles of the signal crayfish reside during daylight hours in shelters. At twilight they leave for food, at daybreak they either return or find another shelter. We examined conflicts over burrow ownership. At low densities with equal numbers of sh
Publikováno v:
Scopus-Elsevier
Determining whether the composition of ecological communities (species presence and abundance), can be predicted from species demographic traits, rather than being a result of neutral drift, is a key ecological question. Here we compare the similarit
Autor:
Heikki Henttonen, Pertti Saurola, Erkki Korpimäki, Esa Ranta, Jari Valkama, Hannu Pietiäinen, Patrik Byholm, Aleksi Lehikoinen
Publikováno v:
Oikos. 118:829-836
A changing climate induces shifts in the location of biomes. Tracing such a shift may pose problems for life history traits adapted to the prior conditions, so that, e.g. the timing of reproduction and the time with sufficient resources for rearing h
Publikováno v:
Oikos. 117:1907-1911
Competition is assumed to generate compensatory dynamics where an increase in one species is compensated by a decrease in others. Recently, using a community covariance technique, Houlahan et al. found that compensatory dynamics are only visible in 2