Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2002.2.03
T. Tiido
{"title":"New records of aphids (Homoptera, Aphidodea) from Estonia","authors":"T. Tiido","doi":"10.3176/biol.ecol.2002.2.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.2002.2.03","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121728449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2000.1.04
T. Virro
{"title":"TAXONOMIC PROBLEMS IN THE GENUS Polyarthra FROM LAKE PEIPSI","authors":"T. Virro","doi":"10.3176/biol.ecol.2000.1.04","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.1.04","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"360 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115905326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.1999.4.02
A. Reinart, A. Herlevi
{"title":"DIFFUSE ATTENUATION COEFFICIENT IN SOME ESTONIAN AND FINNISH LAKES","authors":"A. Reinart, A. Herlevi","doi":"10.3176/biol.ecol.1999.4.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.4.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134125591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.1997.1/2.03
A. Milius, H. Starast
{"title":"A THREE-PARAMETER TROPHIC STATE INDEX FOR SMALL LAKES","authors":"A. Milius, H. Starast","doi":"10.3176/biol.ecol.1997.1/2.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.1997.1/2.03","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134132901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2005.1.01
M. Haldna, K. Kangur, R. Laugaste, A. Milius, T. Möls
{"title":"Water level and water temperature as factors determining phytoplankton biomass and nutrient content in Lake Peipsi","authors":"M. Haldna, K. Kangur, R. Laugaste, A. Milius, T. Möls","doi":"10.3176/biol.ecol.2005.1.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2005.1.01","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"419-420 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134320626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2005.4.12
S. Jänsch, T. Moser, J. Römbke
{"title":"State-of-the-art: the use of Enchytraeidae (Oligochaeta) as test and indicator organisms in standardized ecotoxicological tests","authors":"S. Jänsch, T. Moser, J. Römbke","doi":"10.3176/biol.ecol.2005.4.12","DOIUrl":"https://doi.org/10.3176/biol.ecol.2005.4.12","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129377414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2006.1.03
A. Lõhmus
I studied 423 nests of six raptor species in east-central Estonia to (1) distinguish the essential features of the nest sites, (2) link the nest-tree and nest-stand characteristics, and (3) explore whether the availability of potential nest trees and stands limits raptor populations in managed forest landscapes. Aquila pomarina was the only species having distinct preferences for a few site types, while Accipiter gentilis and Falco subbuteo selected stands according to composition rather than site type. Coniferous trees, particularly spruce, were greatly favoured for nest-building by all species, probably due to better protective cover. Size of the nest tree was more important than its age; though on poor soils, nest trees were both older and smaller. A. gentilis, A. pomarina, and Buteo buteo appeared to be most prone to the lack of potential nest trees in managed forests, e.g. stands < 80 years old were generally inhabitable only if these contained older trees. Green-tree retention could greatly add nest sites for these raptors in managed forests. However, nest-site selectivity did not correlate with the population sizes of the six species, suggesting that nest-sites were not the main limiting factor for them.
{"title":"Nest-tree and nest-stand characteristics of forest-dwelling raptors in east-central Estonia: implications for forest management and conservation","authors":"A. Lõhmus","doi":"10.3176/biol.ecol.2006.1.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.2006.1.03","url":null,"abstract":"I studied 423 nests of six raptor species in east-central Estonia to (1) distinguish the essential features of the nest sites, (2) link the nest-tree and nest-stand characteristics, and (3) explore whether the availability of potential nest trees and stands limits raptor populations in managed forest landscapes. Aquila pomarina was the only species having distinct preferences for a few site types, while Accipiter gentilis and Falco subbuteo selected stands according to composition rather than site type. Coniferous trees, particularly spruce, were greatly favoured for nest-building by all species, probably due to better protective cover. Size of the nest tree was more important than its age; though on poor soils, nest trees were both older and smaller. A. gentilis, A. pomarina, and Buteo buteo appeared to be most prone to the lack of potential nest trees in managed forests, e.g. stands < 80 years old were generally inhabitable only if these contained older trees. Green-tree retention could greatly add nest sites for these raptors in managed forests. However, nest-site selectivity did not correlate with the population sizes of the six species, suggesting that nest-sites were not the main limiting factor for them.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133253299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2003.3.02
P. Kangas, M. Kiirikki, I. Kotta, J. Kotta, A. Laine, J. Lehtoranta, A. Mäkinen, P. Moskalenko, H. Peltonen, M. Perttilä, H. Pitkänen
{"title":"Benthic release of phosphorus and its relation to environmental conditions in the estuarial Gulf of Finland, Baltic Sea, in the early 2000s","authors":"P. Kangas, M. Kiirikki, I. Kotta, J. Kotta, A. Laine, J. Lehtoranta, A. Mäkinen, P. Moskalenko, H. Peltonen, M. Perttilä, H. Pitkänen","doi":"10.3176/biol.ecol.2003.3.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.3.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127242390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2004.3.01
J. Punning, Liisa Puusepp, T. Koff
The diatom assemblages, organic carbon to nitrogen (OC/N) ratio, and macrophyte remains in surface sediment samples from small dimictic Lake Vaike Juusa in southern Estonia were analysed. The results obtained show that changes in the composition of diatoms, macrophyte remains, and OC/N values are in logical dependence on the water depth in the studied site. So the species richness and number of periphytic diatoms are higher in samples collected in the littoral area, from depths up to 3.5 m. The abundance of macrophyte remains is also higher in the littoral. The OC/N ratio, which reflects the share of planktonic matter in the bulk organic matter, has a tendency to increase from the littoral towards the profundal zone. The data obtained by the three different methods enable to apply this approach to study lake-level change in the past.
{"title":"Spatial variability of diatoms, subfossil macrophytes, and OC/N values in surface sediments of Lake Väike Juusa (southern Estonia)","authors":"J. Punning, Liisa Puusepp, T. Koff","doi":"10.3176/biol.ecol.2004.3.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2004.3.01","url":null,"abstract":"The diatom assemblages, organic carbon to nitrogen (OC/N) ratio, and macrophyte remains in surface sediment samples from small dimictic Lake Vaike Juusa in southern Estonia were analysed. The results obtained show that changes in the composition of diatoms, macrophyte remains, and OC/N values are in logical dependence on the water depth in the studied site. So the species richness and number of periphytic diatoms are higher in samples collected in the littoral area, from depths up to 3.5 m. The abundance of macrophyte remains is also higher in the littoral. The OC/N ratio, which reflects the share of planktonic matter in the bulk organic matter, has a tendency to increase from the littoral towards the profundal zone. The data obtained by the three different methods enable to apply this approach to study lake-level change in the past.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133789885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.1997.4.06
A. Baburin, J. Coebergh, M. Rahu, K. Gornoi
{"title":"STRIKING INCREASE IN INCIDENCE OF CANCER OF THE ORAL CAVITY AND PHARYNX IN ESTONIA 1968–1992; pp. 261–272","authors":"A. Baburin, J. Coebergh, M. Rahu, K. Gornoi","doi":"10.3176/biol.ecol.1997.4.06","DOIUrl":"https://doi.org/10.3176/biol.ecol.1997.4.06","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115652793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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