Pub Date : 1900-01-01DOI: 10.3176/biol.ecol.2001.1.01
L. Reintam
Areas of former open-cast oil-shale mines afforested about 30 years ago were studied at Sirgala, NE Estonia. Synchronously with the development of high productivity pine stands, a rapid progress of Calcaric Regosol has taken place on pure skeletal (450 -650 g kg -1 of skeleton) quarry detritus. Organic carbon of the R 2O3-humic-fulvic forest humus of litter and root origin amounts to 28 ± 6 g kg -1 in the epipedon formed and to 13 ± 3 g kg -1 in the transitional AC-horizon. The proportion of humus compounds bound with clay and immobile sesquioxides is also significant. Forest humus is active and the soluble fractions make up 60-80% of total organic carbon. Interactions between the formed humus and the mineral stratum of detritus have resulted in the weathering of stone, gravel, and sand fractions and in the accumulation of clay in the epipe don and of silt in the transitional horizon. Subsequent physical and further chemical weathering, progressing in depth, are characteristic of any fraction. The territorial (site) variability of changes in texture is lower than in the composition of organic pedogenetic agents. Ca 2+ forms more than 80% of base exchangeable capacity, the proportion of Mg 2+ being highly variable. Humus colloids are prevalent
研究人员在爱沙尼亚东北部的Sirgala研究了大约30年前造林的露天油页岩矿区。与高产松林的发展同步，在纯骨骼(骨骼450 -650克公斤-1)采石场碎屑上迅速发展了钙质雷戈索尔。凋落物和根源R - 2o3 -腐殖质森林腐殖物有机碳在表层形成中为28±6 g kg -1，在过渡交流层中为13±3 g kg -1。腐殖质化合物与粘土和固定半氧化物结合的比例也很大。森林腐殖质是活跃的，可溶性组分占总有机碳的60-80%。形成的腐殖质与碎屑矿物层之间的相互作用导致了岩石、砾石和砂粒的风化，以及管道层中的粘土和过渡层中的粉砂的堆积。随后的物理和进一步的化学风化，随着深度的发展，是任何馏分的特征。质地变化的地域(地点)变异性低于有机成土剂组成的变异性。ca2 +占碱交换容量的80%以上，Mg +的比例变化很大。腐殖质胶体普遍存在
{"title":"CHANGES IN THE TEXTURE AND EXCHANGE PROPERTIES OF SKELETAL QUARRY DETRITUS UNDER FOREST DURING THIRTY YEARS","authors":"L. Reintam","doi":"10.3176/biol.ecol.2001.1.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2001.1.01","url":null,"abstract":"Areas of former open-cast oil-shale mines afforested about 30 years ago were studied at Sirgala, NE Estonia. Synchronously with the development of high productivity pine stands, a rapid progress of Calcaric Regosol has taken place on pure skeletal (450 -650 g kg -1 of skeleton) quarry detritus. Organic carbon of the R 2O3-humic-fulvic forest humus of litter and root origin amounts to 28 ± 6 g kg -1 in the epipedon formed and to 13 ± 3 g kg -1 in the transitional AC-horizon. The proportion of humus compounds bound with clay and immobile sesquioxides is also significant. Forest humus is active and the soluble fractions make up 60-80% of total organic carbon. Interactions between the formed humus and the mineral stratum of detritus have resulted in the weathering of stone, gravel, and sand fractions and in the accumulation of clay in the epipe don and of silt in the transitional horizon. Subsequent physical and further chemical weathering, progressing in depth, are characteristic of any fraction. The territorial (site) variability of changes in texture is lower than in the composition of organic pedogenetic agents. Ca 2+ forms more than 80% of base exchangeable capacity, the proportion of Mg 2+ being highly variable. Humus colloids are prevalent","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"54 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":"122869248","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.2003.2.04
H. Kukk, T. Paalme
{"title":"Comparison of net primary production rates of Pilayella littoralis (L.) Kjellm. and other dominating macroalgal species in Kõiguste Bay, northeastern Baltic Sea","authors":"H. Kukk, T. Paalme","doi":"10.3176/biol.ecol.2003.2.04","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.2.04","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"15 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":"130180274","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.1998.1.02
U. Lips, L. Mägi
{"title":"BUDGET COMPONENTS OF WATER, SALT, AND NUTRIENTS IN THE GULF OF RIGA IIN 1993–1995; pp. 14–31","authors":"U. Lips, L. Mägi","doi":"10.3176/biol.ecol.1998.1.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.1998.1.02","url":null,"abstract":"","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":"128524434","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.2000.3.01
Ü. Suursaar, M. Otsmann, T. Kullas
{"title":"EXCHANGE PROCESSES IN THE VÄIKE STRAIT (BALTIC SEA): PRESENT, PAST, FUTURE","authors":"Ü. Suursaar, M. Otsmann, T. Kullas","doi":"10.3176/biol.ecol.2000.3.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.3.01","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"77 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":"122515932","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.2004.3.02
A. Erm, T. Soomere
. Wake waves from fast ferries create significant changes in the optical parameters of sea water in the near-bottom layer with a thickness of about 1 m in coastal areas of Tallinn Bay with depths of about 2–5 m. The suspended matter remains in the water column for about 5 min. Rough quantitative estimates, based on the wave-induced increase of the suspended matter in the water column per unit of bottom of the coastal area (about 1 g m –2 ) suggest that the bulk influence of fast ferry traffic in Tallinn Bay may result in an annual loss of the order of 100 L of fine sediments from each metre of the coastal line.
． 在塔林湾沿海深度约为2 ~ 5 m的近底层，快船尾流对厚度约为1 m的海水光学参数产生了显著的影响。悬浮物在水柱中停留约5分钟。根据波浪引起的每单位沿海地区底部水柱中悬浮物的增加(约1 g m -2)，粗略的定量估计表明，塔林湾快速渡轮交通的大量影响可能导致每年从海岸线每米损失100 L左右的细沉积物。
{"title":"Influence of fast ship waves on the optical properties of sea water in Tallinn Bay, Baltic Sea","authors":"A. Erm, T. Soomere","doi":"10.3176/biol.ecol.2004.3.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2004.3.02","url":null,"abstract":". Wake waves from fast ferries create significant changes in the optical parameters of sea water in the near-bottom layer with a thickness of about 1 m in coastal areas of Tallinn Bay with depths of about 2–5 m. The suspended matter remains in the water column for about 5 min. Rough quantitative estimates, based on the wave-induced increase of the suspended matter in the water column per unit of bottom of the coastal area (about 1 g m –2 ) suggest that the bulk influence of fast ferry traffic in Tallinn Bay may result in an annual loss of the order of 100 L of fine sediments from each metre of the coastal line.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"20 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":"122293347","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.2003.1.02
T. Saat, A. Veersalu
{"title":"Chronology of embryonic development in Baltic herring Clupea harengus membras","authors":"T. Saat, A. Veersalu","doi":"10.3176/biol.ecol.2003.1.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.1.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"22 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":"125919700","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.2000.2.01
K. Kruusement, J. Punning
{"title":"DISTRIBUTION OF PHOSPHORUS IN THE SEDIMENT CORE OF HYPERTROPHIC LAKE RUUSMAE AND SOME PALAEOECOLOGICAL CONCLUSIONS","authors":"K. Kruusement, J. Punning","doi":"10.3176/biol.ecol.2000.2.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.2.01","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"30 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":"125975621","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.2002.3.03
S. Jevrejeva
{"title":"History of ice research in the Baltic Sea along the Estonian coast","authors":"S. Jevrejeva","doi":"10.3176/biol.ecol.2002.3.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.2002.3.03","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"55 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":"127821156","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.2001.3.01
B. I. Dybern, S. Fonselius
The development of international marine research in the Baltic Sea during the 20th century and Estonian participation are described. The organization of the International Council for Exploration of the Sea and its different working groups connected to the research in the Baltic Sea is explained. The founding and activities of the Conference of Baltic Oceanographers and the Baltic Marine Biologists are described. The international synoptic investigations of the Baltic and especially the "Cooperative Synoptic Investigation of the Baltic", "The International Baltic Year", "Baltic Open Sea Experiment", "Patchiness Experiment", and "The Skagerrak Experiment" and their results are briefly discussed. Some other recent international cooperation is also touched upon. Estonian participation in these activities is explained.
{"title":"INTERNATIONAL MARINE SCIENTIFIC ACTIVITIES IN THE BALTIC SEA WITH SPECIAL REFERENCE TO ESTONIAN PARTICIPATION","authors":"B. I. Dybern, S. Fonselius","doi":"10.3176/biol.ecol.2001.3.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2001.3.01","url":null,"abstract":"The development of international marine research in the Baltic Sea during the 20th century and Estonian participation are described. The organization of the International Council for Exploration of the Sea and its different working groups connected to the research in the Baltic Sea is explained. The founding and activities of the Conference of Baltic Oceanographers and the Baltic Marine Biologists are described. The international synoptic investigations of the Baltic and especially the \"Cooperative Synoptic Investigation of the Baltic\", \"The International Baltic Year\", \"Baltic Open Sea Experiment\", \"Patchiness Experiment\", and \"The Skagerrak Experiment\" and their results are briefly discussed. Some other recent international cooperation is also touched upon. Estonian participation in these activities is explained.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"31 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":"127897609","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.2005.1.04
J. Haberman, T. Virro
{"title":"Annotated list of rotifers of Lake Võrtsjärv","authors":"J. Haberman, T. Virro","doi":"10.3176/biol.ecol.2005.1.04","DOIUrl":"https://doi.org/10.3176/biol.ecol.2005.1.04","url":null,"abstract":"","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":"132875385","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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