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The role of leaves in the uptake of nutrients by uniola paniculata and ammophila breviligulata 叶片在秋叶单叶菌和短叶棉蚜吸收养分中的作用
Chesapeake Science Pub Date : 1977-12-18 DOI: 10.2307/1350366
A. G. Valk
{"title":"The role of leaves in the uptake of nutrients by uniola paniculata and ammophila breviligulata","authors":"A. G. Valk","doi":"10.2307/1350366","DOIUrl":"https://doi.org/10.2307/1350366","url":null,"abstract":"","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126404954","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: 11
Pb 210 -determined sedimentation rate, and accumulation of metals in sediments at a station in Chesapeake Bay pb210测定了切萨皮克湾某监测站沉积物中的沉积速率和金属积累
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350593
J. Schubel, D. Hirschberg
{"title":"Pb 210 -determined sedimentation rate, and accumulation of metals in sediments at a station in Chesapeake Bay","authors":"J. Schubel, D. Hirschberg","doi":"10.2307/1350593","DOIUrl":"https://doi.org/10.2307/1350593","url":null,"abstract":"This paper contains the first published radiometrically determined contemporary sedimentation rate, a rate characteristic of the past few decades, for any part of the Chesapeake Bay estuarine system. Cores collected from a station in the main body of the Chesapeake Bay off Tilghman Island (38°41′30″N, 76°24′00″W) were analyzed for Pb210, organic carbon, nitrogen, and selected metals. A mean sedimentation rate of between 0.09–0.12 cm/y was inferred from the Pb210 data. The distributions of C and N are typical of many areas of the Bay. The distributions of extractable Ni, Cr, Cu, and Pb increased in the upper 10–15 cm of the core. The increases in metal concentrations over the past century or so may be a result of man’s activities.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127917055","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
Physiological response of juvenile striped bass,Morone saxatilis, to low levels of cadmium and mercury 斑纹鲈鱼幼鱼对低水平镉和汞的生理反应
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350590
M. A. Dawson, E. Gould, F. Thurberg, A. Calabrese
{"title":"Physiological response of juvenile striped bass,Morone saxatilis, to low levels of cadmium and mercury","authors":"M. A. Dawson, E. Gould, F. Thurberg, A. Calabrese","doi":"10.2307/1350590","DOIUrl":"https://doi.org/10.2307/1350590","url":null,"abstract":"Juvenile striped bass,Morone saxatilis, were exposed to 0.5, 2.5, and 5.0 parts per billion (ppb) cadmium as cadmium chloride for 30–90 days and to 1.0, 5.0, and 10.0 ppb mercury as mercuric chloride for 30–120 days. Following the longest exposure to each metal, the fish were allowed to recover for 30 days in running seawater. Gill-tissue respiration, glucose-6-phosphatase, malic enzyme, aspartate aminotransferase, and magnesium activation of AAT were measured. Animals exposed to either metal exhibited changes in gill-tissue respiration. There was no significant difference in enzyme activity during exposure to either metal; however, fish cleared for 30 days following exposure to cadmium exhibited a slight drop in liver AAT and G6PdH.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"88 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120904089","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: 38
Distribution of paralichthid flounders (bothidae:Paralichthys) in North Carolina estuaries 北卡罗莱纳河口副鱼纲比目鱼的分布
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350587
A. Powell, F. Schwartz
{"title":"Distribution of paralichthid flounders (bothidae:Paralichthys) in North Carolina estuaries","authors":"A. Powell, F. Schwartz","doi":"10.2307/1350587","DOIUrl":"https://doi.org/10.2307/1350587","url":null,"abstract":"Summer flounder,Paralichthys dentatus, and southern flouder,P. lethostigma, extensively use Pamilco Sound and adjacent estuaries as nursery areas. Young gulf flounder,P. albiguta, are rarely found. Flounders remain in the estuaries for the first 18–20 months of their life before moving into ocean waters. Benthic substrate and salinity are the two most important factors governing distribution. Southern flounder are most abundant in areas of low salinity and clayey silt or organic rich mud bottoms. Summer flounder are most abundant in areas of moderate to high salinities and sandy bottom.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114406836","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: 54
Shell color and pattern variation in Mytilus edulis and its adaptive significance 紫贻贝(Mytilus edulis)贝壳颜色和花纹的变化及其适应意义
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350595
J. B. Mitton
{"title":"Shell color and pattern variation in Mytilus edulis and its adaptive significance","authors":"J. B. Mitton","doi":"10.2307/1350595","DOIUrl":"https://doi.org/10.2307/1350595","url":null,"abstract":"The blue mussel,Mytilus edulis, may be found with some degree of pale striping on the shell. This variation was postulated to have an adaptive significance, with the morphs differing in the proportion of incident sunlight transformed into heat. The hypothesis was tested by studies of geographic variation of the frequencies of the morphs along latitudinal and tidal zone transects, comparison of sunlit and shaded environments, and byin vivo temperature measurements. The data generally support the hypothesis that striped individuals attain lower temperatures when exposed to sunlight, are favored where mortality from heat stress is common, and are at a disadvantage where mortality from freezing predominates.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121893600","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: 54
Range extension and new hosts for the cymothoid isopodAnilocra acuta 尖棘等足动物的活动范围扩展及新寄主
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350596
T. E. Bowman, S. Grabe, J. H. Hecht
{"title":"Range extension and new hosts for the cymothoid isopodAnilocra acuta","authors":"T. E. Bowman, S. Grabe, J. H. Hecht","doi":"10.2307/1350596","DOIUrl":"https://doi.org/10.2307/1350596","url":null,"abstract":"Anilocra acuta (Isopoda: Cymothoidae), previously known from Georgia and from Tampa Bay, Florida, is recorded from the lower Ochlockenee River and from Alligator Harbor, Florida, from Louisiana, and from the lower Hudson River, New York. New hosts areLepisosteus spatula, Bairdiella chrysura, andExox niger.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123339101","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
Phytoplankton cages for the measurement in situ of the growth rates of mixed natural populations 用于测量混合自然种群生长速率的浮游植物笼
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350586
O. Owens, P. Dresler, C. C. Crawford, M. Tyler, H. Seliger
{"title":"Phytoplankton cages for the measurement in situ of the growth rates of mixed natural populations","authors":"O. Owens, P. Dresler, C. C. Crawford, M. Tyler, H. Seliger","doi":"10.2307/1350586","DOIUrl":"https://doi.org/10.2307/1350586","url":null,"abstract":"We have designed and tested phytoplankton “cages” in which captured natural populations can be re-suspendedin situ at their original site or at different sites. The “bars” of the cage consist of a membrane whose pores are sufficiently large to permit relatively rapid exchange of “inside” and “outside” nutrient-containing waters which ensures that the contained phytoplankton are always subjected to the “outside” (in situ) nutrient regime. The pores are sufficiently small to retain the captured phytoplankton. In order to measure growth rates precisely the cages are incubatedin situ for times greater than the doubling times of the population (ca. 3 days). The population changes within the cages reflect the integral net primary production. Therefore the technique can be used to characterize geographical locations in terms of their potential for supporting the growth of natural phytoplankton populations. A possible specific application of this technique is the comparative study of the effects on the growth of phytoplankton of near field and far field water masses adjoining power plants or sewage treatment plants.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124966646","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: 22
Temporal variation in upper bay mesohaline benthic communities: I. The 9-m mud habitat 上海湾中盐底栖生物群落的时间变化:1 . 9米淤泥生境
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350592
A. Holland, N. Mountford, J. Mihursky
{"title":"Temporal variation in upper bay mesohaline benthic communities: I. The 9-m mud habitat","authors":"A. Holland, N. Mountford, J. Mihursky","doi":"10.2307/1350592","DOIUrl":"https://doi.org/10.2307/1350592","url":null,"abstract":"Yearly and seasonal changes in the structure of the macrobenthic (>1.0 mm) community occurring in the 9-m mud habitat of the Calvert Cliffs region of the Chesapeake Bay were examined for three years. Seasonal changes in the numerically dominant species resulted in varying community structure and was characterized by a near total faunal depletion during summer, initial recolonization during early fall, secondary recolonization during late fall, and growth and structural development during winter and spring. The faunal depletion that occurred each summer caused the cycle to repeat on an annual basis. The structure of the community was similar each year during initial recolonization (fall), but varied during secondary recolonization (winter and spring), reflecting the recruitment success of species that reproduce in the fall (i.e.,Macoma balthica, Mulinia lateralis, Nereis succinea, andParaprionospio pinnata). These findings have profound implications for the design and interpretation of power plant preoperational-postoperational impact studies.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124695706","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: 105
Increasing shoreline erosion rates with decreasing tidal range in the Virginia Chesapeake Bay 随着弗吉尼亚切萨皮克湾潮汐差的减小，海岸线侵蚀率增加
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350594
P. Rosen
{"title":"Increasing shoreline erosion rates with decreasing tidal range in the Virginia Chesapeake Bay","authors":"P. Rosen","doi":"10.2307/1350594","DOIUrl":"https://doi.org/10.2307/1350594","url":null,"abstract":"The Virginia Chesapeake Bay has a large variation (200%) in tidal range (.36m to 1m) over a relatively short (120 km) distance. Analysis of a regional sampling of shoreline morphology and processes demonstrates that decreasing tidal ranges result in increasing long-term erosion rates. This results because larger tidal ranges form a higher elevation beach. Thus, in larger tidal range areas, water levels increased by storm surges have a lower probability of reaching the elevation of the fastland (bluff or dune) material to augment erosion. Secondly, the wave energy is distributed over a greater distance in the course of a tidal cycle.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122525345","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: 34
Occurrence ofEuconchoecia chierchiae Müller, 1890, (Ostracoda, Halocyprididae) in Cedar Bayou, Chambers County, Texas 美国德克萨斯州钱伯斯县雪松湾(Cedar Bayou, Chambers County)蚊科(介形虫科，halocypridiae)的发生
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350597
J. H. Baker, T. Jones, J. Salinas
{"title":"Occurrence ofEuconchoecia chierchiae Müller, 1890, (Ostracoda, Halocyprididae) in Cedar Bayou, Chambers County, Texas","authors":"J. H. Baker, T. Jones, J. Salinas","doi":"10.2307/1350597","DOIUrl":"https://doi.org/10.2307/1350597","url":null,"abstract":"","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133812075","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
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