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Proceedings of the Estonian Academy of Sciences. Biology. Ecology最新文献

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A CLASSIFICATION OF RIVER REACHES ON THE BASIS OF WATER QUALITY WITH REFERENCE TO STREAMS OF SAAREMAA ISLAND 以萨雷马岛的河流为例，根据水质对河段进行分类
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.1997.1/2.02
P. Pall
{"title":"A CLASSIFICATION OF RIVER REACHES ON THE BASIS OF WATER QUALITY WITH REFERENCE TO STREAMS OF SAAREMAA ISLAND","authors":"P. Pall","doi":"10.3176/biol.ecol.1997.1/2.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.1997.1/2.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"16 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":"131835207","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: 0
MAPPING OF WETLAND HABITAT DIVERSITY USING SATELLITE DATA AND GIS: AN EXAMPLE FROM THE ALAM-PEDJA NATURE RESERVE, ESTONIA 利用卫星数据和地理信息系统绘制湿地生境多样性:以爱沙尼亚alam-pedja自然保护区为例
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2000.2.02
Kiira AAVIKSOO®, Jaanus PAALb, Tiina DISLIS®
{"title":"MAPPING OF WETLAND HABITAT DIVERSITY USING SATELLITE DATA AND GIS: AN EXAMPLE FROM THE ALAM-PEDJA NATURE RESERVE, ESTONIA","authors":"Kiira AAVIKSOO®, Jaanus PAALb, Tiina DISLIS®","doi":"10.3176/biol.ecol.2000.2.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2000.2.02","url":null,"abstract":".The experience of compiling a habitat map of the Alam-Pedja Nature Reserve, Estonia, based on integrating remote sensing (Landsat 5 TM, aerial photos), Geographic Information Systems (GIS), and national biological survey data is reported and discussed. Unsupervised and supervised classification and the maximum likelihood algorithm were used for the classification of satellite image pixels. Training polygons for justification of the classification were established after the repetitive checking of all classification units during the classification procedure. On that basis the mapping ofdifferent habitats, specific for the temperate zone and especially for Estonian nature, using a classification scheme with an emphasis on spectral separation of wetland and related forest types on satellite images was developed. The resultant map (1:50 000, Transverse Mercator Projection) includes 26 mapping units and fits rather well the Estonian habitat classification scheme. The map can be employed for land use conflict resolution, for monitoring at landscape and habitat level, as well as in biodiversity studies.","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":"131847606","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: 8
Suitability of MODIS 250 m resolution band data for quantitative mapping of cyanobacterial blooms MODIS 250 m分辨率波段数据对蓝藻华定量制图的适用性
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2006.4.04
T. Kutser, L. Metsamaa, E. Vahtmäe, N. Strömbeck
{"title":"Suitability of MODIS 250 m resolution band data for quantitative mapping of cyanobacterial blooms","authors":"T. Kutser, L. Metsamaa, E. Vahtmäe, N. Strömbeck","doi":"10.3176/biol.ecol.2006.4.04","DOIUrl":"https://doi.org/10.3176/biol.ecol.2006.4.04","url":null,"abstract":"Optical properties of three bloom-forming cyanobacteria - Aphanizomenon flos-aquae var. baltica, Anabaena circinalis, and Nodularia spumigena - were studied in laboratory experiments. Specific absorption and backscattering coefficients of these cyanobacteria were used in an optical model to simulate water reflectance in the case of different concentrations of cyanobacteria. MODIS band 1 (620-670 nm) response to changes in the concentration of cyanobacteria was simulated from the spectral reflectance data. The results show that MODIS band 1 response to changes in the concentration of cyanobacteria is nonlinear. Band 1 response is strongest in the case of Nodularia spumigena, indicating that quantitative mapping of this species in bloom conditions is easier than in the case of the other two species of cyanobacteria investigated.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"146 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":"123348515","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: 29
Tracing the pathways of particles settling into a small lake 追踪粒子沉降到小湖中的路径
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2002.4.01
T. Alliksaar, T. Koff, J. Punning, J. Terasmaa
{"title":"Tracing the pathways of particles settling into a small lake","authors":"T. Alliksaar, T. Koff, J. Punning, J. Terasmaa","doi":"10.3176/biol.ecol.2002.4.01","DOIUrl":"https://doi.org/10.3176/biol.ecol.2002.4.01","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":"130820465","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: 2
CORRELATIONS BETWEEN LIMNOLOGICAL VARIABLES OF ESTONIAN LAKES 爱沙尼亚湖泊湖泊变量之间的相关性
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.1999.2.03
A. Milius, H. Starast
{"title":"CORRELATIONS BETWEEN LIMNOLOGICAL VARIABLES OF ESTONIAN LAKES","authors":"A. Milius, H. Starast","doi":"10.3176/biol.ecol.1999.2.03","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.2.03","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"33 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":"130226613","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
Model calculations of diffuse attenuation coefficient spectra in lake waters 湖泊水体扩散衰减系数谱的模式计算
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2006.1.05
B. Paavel, H. Arst, A. Reinart, A. Herlevi
{"title":"Model calculations of diffuse attenuation coefficient spectra in lake waters","authors":"B. Paavel, H. Arst, A. Reinart, A. Herlevi","doi":"10.3176/biol.ecol.2006.1.05","DOIUrl":"https://doi.org/10.3176/biol.ecol.2006.1.05","url":null,"abstract":"The reliability of the models elaborated for recreating the spectra of the light attenuation coefficient, d, , K λ on the basis of its measured values at 1-3 wavelengths was studied. The coefficients of the \"one-point\" (490 nm) model, elaborated earlier by A. Reinart and A. Herlevi, were tested and approved using 43 new spectra of underwater irradiance measured in 1999-2000. A new version (named C-model) allowing recreation of the spectrum of d, K λ on the basis on its measured values","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":"114831983","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: 9
QUANTITATIVE MONITORING OF WATER PROPERTIES WITH THE AIRBORNE IMAGING SPECTROMETER AISA 航空成像光谱仪对水性质的定量监测
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.1999.1.02
T. Kutser, K. Kallio, K. Eloheimo, Tuula Hannonen, T. Pyhalahti, S. Koponen, J. Pulliainen
{"title":"QUANTITATIVE MONITORING OF WATER PROPERTIES WITH THE AIRBORNE IMAGING SPECTROMETER AISA","authors":"T. Kutser, K. Kallio, K. Eloheimo, Tuula Hannonen, T. Pyhalahti, S. Koponen, J. Pulliainen","doi":"10.3176/biol.ecol.1999.1.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.1999.1.02","url":null,"abstract":". Remote sensing measurements with an airborne imaging spectrometer (AISA) were carried out on Finnish lakes and the Archipelago Sea to test the suitability of passive optical remote sensing methods for quantitative monitoring of different water properties. Eight water characteristics were under investigation: concentrations of chlorophyll a, pheophytin, suspended matter (Nuclepore and Whatman GFC filters), total phosphorus, total and dissolved organic carbon; water turbidity; and the Secchi disk depth. Over 70 retrieval variables from simple spectral ratios and their combinations to more sophisticated functions were tested. The suitability of two different spatial resolutions (20 x 20 and 100 x 100 m) was tested. Algorithms were found for quantitative estimation ofthe above-mentioned water characteristics from spectral data measured with AISA.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"375 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":"114882848","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
Mean zooplankter weight as a characteristic feature of an aquatic ecosystem 浮游动物的平均体重是水生生态系统的一个特征
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2002.1.02
J. Haberman, H. Künnap
{"title":"Mean zooplankter weight as a characteristic feature of an aquatic ecosystem","authors":"J. Haberman, H. Künnap","doi":"10.3176/biol.ecol.2002.1.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2002.1.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"21 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":"114698080","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: 6
Increase in antiplatelet effects of prostaglandins by α-tocopherol and quercetin α-生育酚和槲皮素增强前列腺素抗血小板作用
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2005.2.02
G. Kobzar, V. Mardla, N. Samel
{"title":"Increase in antiplatelet effects of prostaglandins by α-tocopherol and quercetin","authors":"G. Kobzar, V. Mardla, N. Samel","doi":"10.3176/biol.ecol.2005.2.02","DOIUrl":"https://doi.org/10.3176/biol.ecol.2005.2.02","url":null,"abstract":"","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"14 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":"134151886","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: 0
A specific impact of waves of fast ferries on sediment transport processes in Tallinn Bay 塔林湾快速轮渡波浪对泥沙输送过程的具体影响
Proceedings of the Estonian Academy of Sciences. Biology. Ecology Pub Date : 1900-01-01 DOI: 10.3176/biol.ecol.2003.3.11
T. Soomere, J. Kask
{"title":"A specific impact of waves of fast ferries on sediment transport processes in Tallinn Bay","authors":"T. Soomere, J. Kask","doi":"10.3176/biol.ecol.2003.3.11","DOIUrl":"https://doi.org/10.3176/biol.ecol.2003.3.11","url":null,"abstract":". Tallinn Bay is a semi-enclosed basin in the Gulf of Finland with a mild wave regime and an exceptionally heavy density of high speed ship traffic. Several implications resulting from the difference between the periods of wind waves (typically 3–4 s, maximum 7–8 s in extreme storms) and waves excited by fast ferries (10–15 s) are described. It is shown that ship-generated waves may play a decisive role in certain coastal processes. They cause unusually high near-bottom velocities at depths of 5–25 m. The influence of ship waves may trigger an additional sediment transport mechanism and cause considerable changes in the existing balance of sediment transport processes.","PeriodicalId":250336,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Biology. Ecology","volume":"13 6 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":"133990213","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: 20
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