The effect of human-modified landscape structure on forest grouse broods in two landscape types
Huhta, E., Helle, P., Nivala, V. and Nikula, A. (2018). The effect of human-modified landscape structure on forest grouse broods in two landscape types. 5th European Congress of Conservation Biology. doi: 10.17011/conference/eccb2018/107449
© the Authors, 2018
The population sizes and the breeding success of Finnish tetraonids have been decreasing for decades. In this study, the presence of a grouse hen with a brood in a landscape was used to indicate habitat-related breeding success. We combined the locations of 938 black grouse (Tetrao tetrix), 388 capercaillie (T. urogallus), and 917 hazel grouse (Tetrastes bonasia) broods after the breeding season in mid-August with landscape data by employing Geographic Information Systems (GIS) and grouse data derived from the Finnish wildlife triangle censuses conducted during 1997–2004. Two large study areas with different landscape structures; northern forest-mire area and southern cultivated area, were selected for the investigation. The presence of grouse broods was positively related to the amount of old coniferous mixed forest. Grouse broods may prefer this forest habitat because of a rich understorey cover and a rich bilberry field layer offering a diversity of insects as food. Broods had a strong positive response to the amount of forest habitat. The effect of forest fragmentation on the broods’ distribution did not increase even with decreasing forest habitat. We suggest that there are several ecological causes for the observed spatial correlations. Predation on nests and broods by generalist predators is presumably high in human modified open and semi-open landscapes. Against our expectations, the effect of landscape composition on grouse broods was more marked in the northern than in the southern study area, most likely because predator populations are more food-regulated in the north. This finding supports the alternative-prey hypothesis. Further, large drained and reforested peatland mire areas had a negative impact on grouse broods in the north. In the drainage areas, decreased availability of vegetation cover and insect food, increased predation risk, and drowning of chicks in ditches may increase brood mortality. ...
PublisherOpen Science Centre, University of Jyväskylä
ConferenceECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland
MetadataShow full item record
- ECCB 2018 
Showing items with similar title or keywords.
Effects of retention forestry on bats: relations between forest structure and the landscape matrix Jonker, Marlotte; Braunisch, Veronika; Storch, Ilse; Obrist, Martin (Open Science Centre, University of Jyväskylä, 2018)With more than 1200 species worldwide and comprising roughly one fifth of all mammalian species bats are of great importance for global biodiversity. As bio-indicatorsa they are frequently selected target species for ...
Land use changes could modify future negative effects of climate change on old-growth forest indicator species Snäll, Tord; Mair, Louise; Jönsson, Mari (Open Science Centre, University of Jyväskylä, 2018)Climate change is expected to have major impacts on terrestrial biodiversity at all ecosystem levels, including reductions in species-level distribution and abundance. We aim to test the extent to which land use management, ...
Mappes, Tapio; Boratynski, Zbigniew; Kivisaari, Kati; Lavrinienko, Anton; Milinevsky, Gennadi; Mousseau, Timothy A.; Møller, Anders P.; Tukalenko, Eugene; Watts, Phillip (Ecological Society of America, 2019)Nuclear accidents underpin the need to quantify the ecological mechanisms which determine injury to ecosystems from chronic low‐dose radiation. Here, we tested the hypothesis that ecological mechanisms interact with ionizing ...
Impacts of anthropogenic factors on fish community structure in Lebialem-Mone Forest Landscape of Cameroon Ettagbor, Hans (2010)Two sites of the Cross River within the Lebialem-Mone forest landscape of Cameroon were chosen, one of the sites faced with human activities (test site) and the other with no human pressure (control site). The lengths and ...
A modified niche model for generating food webs with stage-structured consumers : The stabilizing effects of life-history stages on complex food webs Nonaka, Etsuko; Kuparinen, Anna (John Wiley & Sons, 2021)1. Almost all organisms grow in size during their lifetime and switch diets, trophic positions, and interacting partners as they grow. Such ontogenetic development introduces life-history stages and flows of biomass between ...