Are the declining trends in forest grouse populations due to changes in the forest age structure? A case study of Capercaillie in Finland
In Finland, Capercaillie ( Tetrao urogallus) populations have a history of serious decrease starting from the mid-20th century. The decline is temporally in line with the expansion of modern forestry practices that created major changes in the landscape. We used tetraonid route-censuses from 18 fore...
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| creator | Sirkiä, Saija Lindén, Andreas Helle, Pekka Nikula, Ari Knape, Jonas Lindén, Harto |
| description | In Finland, Capercaillie (
Tetrao urogallus) populations have a history of serious decrease starting from the mid-20th century. The decline is temporally in line with the expansion of modern forestry practices that created major changes in the landscape. We used tetraonid route-censuses from 18 forestry board districts and Finnish forest inventories (data on forest stand structure) to analyze the decline in 1965–1988. We used information theoretical model selection to evaluate a set of log-linear second order autoregressive models, allowing for spatially correlated process errors. The average trend throughout the country corresponded to an annual decline of 4.01% (mean of local trends)
±
0.24% (SEM), parallel to a half-life of 17
years. The decline was surprisingly uniform throughout the country (SD
=
1.01%) and most parsimoniously explained by a geographically constant log-linear trend. At the large scale of observation applied here, population trends could not be explained by the proportional increase of younger forest age classes ( |
| doi_str_mv | 10.1016/j.biocon.2010.03.038 |
| format | Article |
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Tetrao urogallus) populations have a history of serious decrease starting from the mid-20th century. The decline is temporally in line with the expansion of modern forestry practices that created major changes in the landscape. We used tetraonid route-censuses from 18 forestry board districts and Finnish forest inventories (data on forest stand structure) to analyze the decline in 1965–1988. We used information theoretical model selection to evaluate a set of log-linear second order autoregressive models, allowing for spatially correlated process errors. The average trend throughout the country corresponded to an annual decline of 4.01% (mean of local trends)
±
0.24% (SEM), parallel to a half-life of 17
years. The decline was surprisingly uniform throughout the country (SD
=
1.01%) and most parsimoniously explained by a geographically constant log-linear trend. At the large scale of observation applied here, population trends could not be explained by the proportional increase of younger forest age classes (<40
years old and <80
years old, respectively). Our analysis does not support the hypothesis that the decline in Capercaillie numbers is due to changes in the forest age structure, but we cannot exclude the possibility that other factors behind the decline may have interacted with forestry in general. From a conservation point of view, we caution against over-emphasizing the role of forest age especially at large spatial scales, but leaning also on other research, we recommend that more management efforts would go into the preservation of the overall forest cover and the original physiognomy in single forest patches.</description><identifier>ISSN: 0006-3207</identifier><identifier>EISSN: 1873-2917</identifier><identifier>DOI: 10.1016/j.biocon.2010.03.038</identifier><identifier>CODEN: BICOBK</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Age ; Animal, plant and microbial ecology ; Applied ecology ; Biological ; Biological and medical sciences ; case studies ; Conservation ; Conservation, protection and management of environment and wildlife ; Correlation ; forest habitats ; forest management ; Forestry ; Forests ; Fundamental and applied biological sciences. Psychology ; game birds ; General forest ecology ; Generalities. Production, biomass. Quality of wood and forest products. General forest ecology ; Grouse ; Landscapes ; males ; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking ; population dynamics ; population size ; Populations ; Spatial population dynamics ; Tetrao urogallus ; Time series analysis ; Trends ; wildlife habitats ; wildlife management</subject><ispartof>Biological conservation, 2010-06, Vol.143 (6), p.1540-1548</ispartof><rights>2010 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c438t-ffc9e1c3123c175f0aa4060860732c4811cd0cdb1669592d438fba47e9c8b8e43</citedby><cites>FETCH-LOGICAL-c438t-ffc9e1c3123c175f0aa4060860732c4811cd0cdb1669592d438fba47e9c8b8e43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0006320710001412$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22817825$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Sirkiä, Saija</creatorcontrib><creatorcontrib>Lindén, Andreas</creatorcontrib><creatorcontrib>Helle, Pekka</creatorcontrib><creatorcontrib>Nikula, Ari</creatorcontrib><creatorcontrib>Knape, Jonas</creatorcontrib><creatorcontrib>Lindén, Harto</creatorcontrib><title>Are the declining trends in forest grouse populations due to changes in the forest age structure? A case study of Capercaillie in Finland</title><title>Biological conservation</title><description>In Finland, Capercaillie (
Tetrao urogallus) populations have a history of serious decrease starting from the mid-20th century. The decline is temporally in line with the expansion of modern forestry practices that created major changes in the landscape. We used tetraonid route-censuses from 18 forestry board districts and Finnish forest inventories (data on forest stand structure) to analyze the decline in 1965–1988. We used information theoretical model selection to evaluate a set of log-linear second order autoregressive models, allowing for spatially correlated process errors. The average trend throughout the country corresponded to an annual decline of 4.01% (mean of local trends)
±
0.24% (SEM), parallel to a half-life of 17
years. The decline was surprisingly uniform throughout the country (SD
=
1.01%) and most parsimoniously explained by a geographically constant log-linear trend. At the large scale of observation applied here, population trends could not be explained by the proportional increase of younger forest age classes (<40
years old and <80
years old, respectively). Our analysis does not support the hypothesis that the decline in Capercaillie numbers is due to changes in the forest age structure, but we cannot exclude the possibility that other factors behind the decline may have interacted with forestry in general. From a conservation point of view, we caution against over-emphasizing the role of forest age especially at large spatial scales, but leaning also on other research, we recommend that more management efforts would go into the preservation of the overall forest cover and the original physiognomy in single forest patches.</description><subject>Age</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological</subject><subject>Biological and medical sciences</subject><subject>case studies</subject><subject>Conservation</subject><subject>Conservation, protection and management of environment and wildlife</subject><subject>Correlation</subject><subject>forest habitats</subject><subject>forest management</subject><subject>Forestry</subject><subject>Forests</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>game birds</subject><subject>General forest ecology</subject><subject>Generalities. Production, biomass. Quality of wood and forest products. General forest ecology</subject><subject>Grouse</subject><subject>Landscapes</subject><subject>males</subject><subject>Parks, reserves, wildlife conservation. Endangered species: population survey and restocking</subject><subject>population dynamics</subject><subject>population size</subject><subject>Populations</subject><subject>Spatial population dynamics</subject><subject>Tetrao urogallus</subject><subject>Time series analysis</subject><subject>Trends</subject><subject>wildlife habitats</subject><subject>wildlife management</subject><issn>0006-3207</issn><issn>1873-2917</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kN2KFDEQhYMoOK6-gWBuxKuezU__pG-UYXB1YcEL3euQqVR6M_QmbdIt7CP41qbtwUuhIKT4TtWpQ8hbzvac8fb6vD_5CDHsBSstJkupZ2THVScr0fPuOdkxxtpKCta9JK9yPpdvJ9tmR34fEtL5AalFGH3wYaBzwmAz9YG6mDDPdEhxyUinOC2jmX0MmdqlqCKFBxMG_MuuMy68GZDmOS0wLwk_0QMFk9fOYp9odPRoJkxg_Dh6XJU3Powm2NfkhTNjxjeX94rc33z-cfxa3X37cns83FVQSzVXzkGPHCQXEnjXOGZMzVqm2nKQgFpxDpaBPfG27Zte2CJyJ1N32IM6KazlFfmwzZ1S_LkUv_rRZ8CxeMByp-6aXnLOVF_IeiMhxZwTOj0l_2jSk-ZMr8Hrs96C12vwmslSqsjeXxaYDGZ0yQTw-Z9WCMU7JZrCvds4Z6I2QyrM_fcySDKuaqaYLMTHjcCSxy-PSWfwGACtTwizttH_38of0gylfQ</recordid><startdate>20100601</startdate><enddate>20100601</enddate><creator>Sirkiä, Saija</creator><creator>Lindén, Andreas</creator><creator>Helle, Pekka</creator><creator>Nikula, Ari</creator><creator>Knape, Jonas</creator><creator>Lindén, Harto</creator><general>Elsevier Ltd</general><general>Kidlington, Oxford: Elsevier Science Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20100601</creationdate><title>Are the declining trends in forest grouse populations due to changes in the forest age structure? A case study of Capercaillie in Finland</title><author>Sirkiä, Saija ; Lindén, Andreas ; Helle, Pekka ; Nikula, Ari ; Knape, Jonas ; Lindén, Harto</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c438t-ffc9e1c3123c175f0aa4060860732c4811cd0cdb1669592d438fba47e9c8b8e43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Age</topic><topic>Animal, plant and microbial ecology</topic><topic>Applied ecology</topic><topic>Biological</topic><topic>Biological and medical sciences</topic><topic>case studies</topic><topic>Conservation</topic><topic>Conservation, protection and management of environment and wildlife</topic><topic>Correlation</topic><topic>forest habitats</topic><topic>forest management</topic><topic>Forestry</topic><topic>Forests</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>game birds</topic><topic>General forest ecology</topic><topic>Generalities. Production, biomass. Quality of wood and forest products. General forest ecology</topic><topic>Grouse</topic><topic>Landscapes</topic><topic>males</topic><topic>Parks, reserves, wildlife conservation. Endangered species: population survey and restocking</topic><topic>population dynamics</topic><topic>population size</topic><topic>Populations</topic><topic>Spatial population dynamics</topic><topic>Tetrao urogallus</topic><topic>Time series analysis</topic><topic>Trends</topic><topic>wildlife habitats</topic><topic>wildlife management</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sirkiä, Saija</creatorcontrib><creatorcontrib>Lindén, Andreas</creatorcontrib><creatorcontrib>Helle, Pekka</creatorcontrib><creatorcontrib>Nikula, Ari</creatorcontrib><creatorcontrib>Knape, Jonas</creatorcontrib><creatorcontrib>Lindén, Harto</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Biological conservation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sirkiä, Saija</au><au>Lindén, Andreas</au><au>Helle, Pekka</au><au>Nikula, Ari</au><au>Knape, Jonas</au><au>Lindén, Harto</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Are the declining trends in forest grouse populations due to changes in the forest age structure? A case study of Capercaillie in Finland</atitle><jtitle>Biological conservation</jtitle><date>2010-06-01</date><risdate>2010</risdate><volume>143</volume><issue>6</issue><spage>1540</spage><epage>1548</epage><pages>1540-1548</pages><issn>0006-3207</issn><eissn>1873-2917</eissn><coden>BICOBK</coden><abstract>In Finland, Capercaillie (
Tetrao urogallus) populations have a history of serious decrease starting from the mid-20th century. The decline is temporally in line with the expansion of modern forestry practices that created major changes in the landscape. We used tetraonid route-censuses from 18 forestry board districts and Finnish forest inventories (data on forest stand structure) to analyze the decline in 1965–1988. We used information theoretical model selection to evaluate a set of log-linear second order autoregressive models, allowing for spatially correlated process errors. The average trend throughout the country corresponded to an annual decline of 4.01% (mean of local trends)
±
0.24% (SEM), parallel to a half-life of 17
years. The decline was surprisingly uniform throughout the country (SD
=
1.01%) and most parsimoniously explained by a geographically constant log-linear trend. At the large scale of observation applied here, population trends could not be explained by the proportional increase of younger forest age classes (<40
years old and <80
years old, respectively). Our analysis does not support the hypothesis that the decline in Capercaillie numbers is due to changes in the forest age structure, but we cannot exclude the possibility that other factors behind the decline may have interacted with forestry in general. From a conservation point of view, we caution against over-emphasizing the role of forest age especially at large spatial scales, but leaning also on other research, we recommend that more management efforts would go into the preservation of the overall forest cover and the original physiognomy in single forest patches.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.biocon.2010.03.038</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Age Animal, plant and microbial ecology Applied ecology Biological Biological and medical sciences case studies Conservation Conservation, protection and management of environment and wildlife Correlation forest habitats forest management Forestry Forests Fundamental and applied biological sciences. Psychology game birds General forest ecology Generalities. Production, biomass. Quality of wood and forest products. General forest ecology Grouse Landscapes males Parks, reserves, wildlife conservation. Endangered species: population survey and restocking population dynamics population size Populations Spatial population dynamics Tetrao urogallus Time series analysis Trends wildlife habitats wildlife management |
| title | Are the declining trends in forest grouse populations due to changes in the forest age structure? A case study of Capercaillie in Finland |
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