Proceedings of the Estonian Academy of Sciences. Biology. Ecology最新文献_第4页

POLLEN INFLUX IN LAKE MATSIMÄE AND ITS CATCHMENT matsimÄe湖及其集水区花粉流入

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.1998.4.02

T. Koff

引用次数: 4

New enchytraeid species since 2002 2002年以来的软体动物新种

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2005.4.01

J. Römbke, R. Schmelz

引用次数: 1

Land snails in Estonian forests: numbers and species richness 爱沙尼亚森林中的蜗牛:数量和物种丰富度

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2002.3.05

Raivo Mänd, Tiina Talvi, Annelie Ehlvest, Piret Kiristaja

{"title":"Land snails in Estonian forests: numbers and species richness","authors":"Raivo Mänd, Tiina Talvi, Annelie Ehlvest, Piret Kiristaja","doi":"10.3176/biol.ecol.2002.3.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.2002.3.05","url":null,"abstract":". A drastic decline in land snail populations has been revealed in the oligotrophic areas of acidified regions of Europe. Since snail shells are an important calcium source for forest passerines, this decline causes severe reductions in forest passerine reproductive rates. In Estonia, about 40% of all woodlands consist of pine forests on poor, naturally acidic soils. It has been shown that birds breeding in such forests suffer calcium deficiency. A research project was carried out to estimate the current situation in Estonian forest land snail populations. This was the first large-scale quantitative investigation of forest snail fauna in the eastern Baltic area. Data about the abundance and species richness of snails are presented by geologically different regions and forest types of Estonia. The effect of industrial forest liming, occurring near some big oil-shale and cement works, was studied. Our data confirm that the number of snails in a substantial portion of Estonian forests is very low, and therefore birds breeding there may be vulnerable to possible increases in acidification. However, atmospheric pollution with calcareous materials in some ecologically problematic industrial regions seems to compensate for calcium deficiency for snail populations.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"79 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":"123427161","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}

引用次数: 3

Hepatotoxic cyanobacterial peptides in Estonian freshwater bodies and inshore marine water 爱沙尼亚淡水水体和近海海水中的肝毒性蓝藻肽

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2005.1.03

K. Kangur, J. Meriluoto, L. Spoof, R. Tanner

引用次数: 13

Nutrient budget of Lake Peipsi in 1998; pp. 407–422 1998年沛斯湖的养分收支407 - 422页

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2003.4.04

Ü. Leisk, E. Loigu, P. Nõges, T. Nõges, A. Reihan, B. Skakalski

引用次数: 6

CORRECTING ERRORS ASSOCIATED WITH UNDERWATER SPECTRAL IRRADIANCE MEASUREMENTS 校正与水下光谱辐照度测量有关的误差

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.1999.2.05

J. Virta, A. Herlevi

引用次数: 3

HISTORY OF INVESTIGATIONS ON THE ECOSYSTEM OF LAKE PEIPSI 裴毗斯湖生态系统调查史

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2001.3.03

K. Kangur, J. Haberman, A. Kangur, P. Kangur, A. Milius, H. Mäemets, R. Laugaste, E. Pihu

{"title":"HISTORY OF INVESTIGATIONS ON THE ECOSYSTEM OF LAKE PEIPSI","authors":"K. Kangur, J. Haberman, A. Kangur, P. Kangur, A. Milius, H. Mäemets, R. Laugaste, E. Pihu","doi":"10.3176/biol.ecol.2001.3.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.2001.3.03","url":null,"abstract":"The investigations of the biota in L. Peipsi, one of the largest lakes of Europe, started already one and a half centuries ago, complex studies were initiated in the 1930s. The paper gives a brief survey of research into the hydrochemistry, macrophytes, bacterio-, phyto- and zooplankton, zoobenthos, fishes, and fisheries management of the lake. Special attention is paid to the main findings. Intensive anthropogenic eutrophication of L. Peipsi started in the 1970s. The nutrient content reached its maximum in the 1980s and decreased thereafter. An expansion of reeds, increase in the similarity between different lake parts, and decline of rare macrophyte species have occurred. Regarding phytoplankton, L. Pihkva has become strongly eutrophic, whereas L. Peipsi s.s. has eutrophied to a smaller extent, its northern part has maintained a mesotrophic appearance. In 1965- 99, the number but not the biomass of zooplankton increased. The number of small-sized zoo- plankters (especially rotifers) increased. No essential changes in the composition and distribution of macrozoobenthos in connection with eutrophication of the lake were observed. Dreissena polymorpha, introduced accidentally in the lake in the 1930s, has become the most significant animal population in L. Peipsi. Considering annual fish catches L. Peipsi surpasses all large lakes in North Europe. The main commercial fishes are smelt, perch, pikeperch, roach, bream, pike, and until the 1990s also vendace. At present it is changing into a smelt-bream-pikeperch lake.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"25 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":"129533822","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}

引用次数: 4

MAIN CHANGES IN THE ICHTHYOCOENOSIS OF LAKE PEIPSI SINCE THE 1950s 20世纪50年代以来沛斯湖鱼类群落的主要变化

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2000.1.07

E. Pihu, A. Kangur

引用次数: 4

Late summer vertical nutrient fluxes estimated from direct turbulence measurements: a Gulf of Finland case study 根据直接湍流测量估计的夏末垂直营养通量:芬兰湾案例研究

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2003.3.03

K. Kononen, T. Kullas, J. Laanemets, M. Lilover, A. Stips

引用次数: 0

Isoenzyme diversity and affinity between Dactylis glomerata and Puccinellia maritima (Poaceae) 茅菖蒲和茅菖蒲的同工酶多样性及亲和性

Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2006.4.01

G. Angelov

引用次数: 2