Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2003.3.09
N. Berezina, V. Panov
During the last ten years two new species of gammarids, Gmelinoides fasciatus (Stebb.) and Pontogammarus robustoides (Sars), invaded the Gulf of Finland. We studied the distribution and abundance of these species and their effects on littoral communities in the Neva estuary in 1998-2002. The study was performed in three types of habitats: Phragmites australis beds, exposed stone littoral, and Cladophora glomerata mats on stones. Feeding rates of the gammarids consuming filamentous algae and benthic invertebrates were estimated experimentally. Intensive consumption of plant food (Cladophora, roots and debris of Phragmites) by gammarids resulted in the production of faeces that increases organic matter availability for benthic detritivores. At the same time, gammarid predation resulted in a decrease of benthic invertebrates. The magnitude of the effects depended on the density of the established species and the type of habitat. In addition, an experimental study of interactions between G. fasciatus and P. robustoides revealed the existence of intraguild predation, which was the strongest in the case of P. robustoides.
{"title":"Establishment of new gammarid species in the eastern Gulf of Finland (Baltic Sea) and their effects on littoral communities","authors":"N. Berezina, V. Panov","doi":"10.3176/biol.ecol.2003.3.09","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.3.09","url":null,"abstract":"During the last ten years two new species of gammarids, Gmelinoides fasciatus (Stebb.) and Pontogammarus robustoides (Sars), invaded the Gulf of Finland. We studied the distribution and abundance of these species and their effects on littoral communities in the Neva estuary in 1998-2002. The study was performed in three types of habitats: Phragmites australis beds, exposed stone littoral, and Cladophora glomerata mats on stones. Feeding rates of the gammarids consuming filamentous algae and benthic invertebrates were estimated experimentally. Intensive consumption of plant food (Cladophora, roots and debris of Phragmites) by gammarids resulted in the production of faeces that increases organic matter availability for benthic detritivores. At the same time, gammarid predation resulted in a decrease of benthic invertebrates. The magnitude of the effects depended on the density of the established species and the type of habitat. In addition, an experimental study of interactions between G. fasciatus and P. robustoides revealed the existence of intraguild predation, which was the strongest in the case of P. robustoides.","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":"129256465","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.2003.4.06
J. Elliku, A. Läänelaid, Ü. Reisner, V. Reisner, M. Rohtla, H. Sander, M. Šestakov†
{"title":"Urban trees of Tallinn, Estonia","authors":"J. Elliku, A. Läänelaid, Ü. Reisner, V. Reisner, M. Rohtla, H. Sander, M. Šestakov†","doi":"10.3176/biol.ecol.2003.4.06","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.4.06","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"12 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":"117190739","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.1997.3.08
M. Heidemaa, M. Viitasaari
{"title":"Parna reseri, A NEW LEAF MINER FOR THE FAUNA OF NORTHERN EUROPE (HYMENOPTERA, TENTHREDINIDAE)","authors":"M. Heidemaa, M. Viitasaari","doi":"10.3176/biol.ecol.1997.3.08","DOIUrl":"https://doi.org/10.3176/biol.ecol.1997.3.08","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"37 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":"116070793","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.1999.3.05
M. Järvan, A. Teedumäe
{"title":"THE EFFECT OF FINELY GROUND ESTONIAN LIMESTONE AND DOLOMITE ON THE GROWTH AND CHEMICAL COMPOSITION OF GREENHOUSE VEGETABLES GROWN ON PEAT SUBSTRATUM","authors":"M. Järvan, A. Teedumäe","doi":"10.3176/biol.ecol.1999.3.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.3.05","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"60 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":"114674413","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.2005.4.09
J. Schlaghamerský, K. Kobetičová
A small annelid community (Enchytraeidae, Tubificidae, Aeolosomatidae) was studied in a field experiment during meadow restoration on arable land and in a well preserved meadow nearby. Comparison of the effect of different seed mixtures and spontaneous succession in an abandoned field revealed no significant differences, but a trend to lower densities in plots sown with regional seed mixture compared to the other treatments was observed. In total 17 enchytraeid, 1 tubificid and 2 aeolosomatid species were recorded at the experimental site. An assamblage of similar species composition with 22 enchytraeid, 1 tuficid and 1 aeolosomatid species was found in the well-preserved meadow.
{"title":"A small annelid community (Enchytraeidae, Tubificidae, Aeolosomatidae) during meadow restoration on arable land and in a nearby well-preserved meadow","authors":"J. Schlaghamerský, K. Kobetičová","doi":"10.3176/biol.ecol.2005.4.09","DOIUrl":"https://doi.org/10.3176/biol.ecol.2005.4.09","url":null,"abstract":"A small annelid community (Enchytraeidae, Tubificidae,\u0000Aeolosomatidae) was studied in a field experiment during meadow\u0000restoration on arable land and in a well preserved meadow\u0000nearby. Comparison of the effect of different seed mixtures and\u0000spontaneous succession in an abandoned field revealed no\u0000significant differences, but a trend to lower densities in\u0000plots sown with regional seed mixture compared to the other\u0000treatments was observed. In total 17 enchytraeid, 1 tubificid\u0000and 2 aeolosomatid species were recorded at the experimental\u0000site. An assamblage of similar species composition with 22\u0000enchytraeid, 1 tuficid and 1 aeolosomatid species was found in\u0000the well-preserved meadow.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"337 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":"126950183","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.1997.4.04
Georg Milander, Vitali Nagirnoi, Ilmar SUDA®
. On the basis of the available collection material and an analysis of the data drawn from scientific literature, the distribution and phenology of four Geotrupes Latr. species in Estonia was clarified. The species G. spiniger was recorded on the territory of Estonia for the first time. An identification key for five species distributed in the northern part of Europe is given.
{"title":"REVISION OF EARTH-BORING DUNG BEETLES FROM THE GENUS Geotrupes Latr. (COLEOPTERA, SCARABAEIDAE) OF ESTONIA","authors":"Georg Milander, Vitali Nagirnoi, Ilmar SUDA®","doi":"10.3176/biol.ecol.1997.4.04","DOIUrl":"https://doi.org/10.3176/biol.ecol.1997.4.04","url":null,"abstract":". On the basis of the available collection material and an analysis of the data drawn from scientific literature, the distribution and phenology of four Geotrupes Latr. species in Estonia was clarified. The species G. spiniger was recorded on the territory of Estonia for the first time. An identification key for five species distributed in the northern part of Europe is given.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"19 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":"126179998","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.1999.4.05
T. Drevs
{"title":"POPULATION DYNAMICS OF FLOUNDER (Platichthysflesus) IN ESTONIAN WATERS","authors":"T. Drevs","doi":"10.3176/biol.ecol.1999.4.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.4.05","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"19 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":"124459423","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.2000.4.05
I. Veldre, S. Karlova
{"title":"CONTENT OF BENZO(a)PYRENE IN ESTONIAN SMALL LAKES","authors":"I. Veldre, S. Karlova","doi":"10.3176/biol.ecol.2000.4.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.4.05","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":"123731769","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.1999.3.02
A. Leeben, S. Babichenko
{"title":"EFFECT OF LIGHT INTENSITY ON THE VARIABILITY OF FLUORESCENCE CHARACTERISTICS OF Phaeocystis sp. (PRYMNESIOPHYCEAE)","authors":"A. Leeben, S. Babichenko","doi":"10.3176/biol.ecol.1999.3.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.3.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"42 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":"121950957","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.2000.2.05
J. Kotta
{"title":"FIRST RECORD OF THE TALITRID AMPHIPOD Orchestia cavimana IN THE NORTHERN BALTIC SEA","authors":"J. Kotta","doi":"10.3176/biol.ecol.2000.2.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.2.05","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"3 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":"121548399","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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