D. Costich, Beryl Robichaud Collins, Karl H. Anderson
{"title":"Plant Communities of New Jersey: A Study in Landscape Diversity. Revised Edition of Vegetation of New Jersey.","authors":"D. Costich, Beryl Robichaud Collins, Karl H. Anderson","doi":"10.2307/2996803","DOIUrl":"https://doi.org/10.2307/2996803","url":null,"abstract":"","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996803","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411673","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}
amine the roles of seed and microsite limitation in determining the microdistribution of the federally-threatened plant, Amphianthus pusillus. Microhabitat variables such as soil depth, maximum water depth, soil texture, soil nutrient status, and number and fecundity of Diamorpha smallii plants correlated poorly with Amphianthus density and fecundity. Density-fecundity relationships were explored by thinning dense populations of young Amphianthus. Mean capsule production/plant declined at densities greater than 1.4 plants/10 cm2, indicating strong intraspecific competition. Capsule production per plot was constant at densities greater than 7.1 plants/10 cm2. Transplanted A. pusillus were significantly less likely to survive to produce seeds when placed in nonAmphianthus pools compared with plants transplanted into Amphianthus-containing pools, implying that microsite limitation occurred. However, 33% of the plots in non-Amphianthus pools produced capsule-bearing plants, indicating that unoccupied suitable habitat may exist and that the distribution of A. pusillus may also be dispersal-limited.
{"title":"Microhabitat requirements and seed/microsite limitation of the rare granite outcrop endemic Amphianthus pusillus (Scrophulariaceae)1","authors":"J. Hilton, R. Boyd, R. Boyd","doi":"10.2307/2996794","DOIUrl":"https://doi.org/10.2307/2996794","url":null,"abstract":"amine the roles of seed and microsite limitation in determining the microdistribution of the federally-threatened plant, Amphianthus pusillus. Microhabitat variables such as soil depth, maximum water depth, soil texture, soil nutrient status, and number and fecundity of Diamorpha smallii plants correlated poorly with Amphianthus density and fecundity. Density-fecundity relationships were explored by thinning dense populations of young Amphianthus. Mean capsule production/plant declined at densities greater than 1.4 plants/10 cm2, indicating strong intraspecific competition. Capsule production per plot was constant at densities greater than 7.1 plants/10 cm2. Transplanted A. pusillus were significantly less likely to survive to produce seeds when placed in nonAmphianthus pools compared with plants transplanted into Amphianthus-containing pools, implying that microsite limitation occurred. However, 33% of the plots in non-Amphianthus pools produced capsule-bearing plants, indicating that unoccupied suitable habitat may exist and that the distribution of A. pusillus may also be dispersal-limited.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996794","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411214","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}
in low light and high nutrient environments. To test this hypothesis, we evaluated the patterns of leaf tannin chemistry in two species of oak (Quercus velutina L. and Q. prinus L.) utilizing protein precipitation methods. Leaves were sampled from mature, forest-grown, canopy trees found in a southeastern Ohio oak-hickory forest. To evaluate the effects of environment, we sampled along a natural gradient using trees from contrasting northand south-facing slopes. To assess the patterns of variation in tannin abundance among populations, we sampled multiple trees from three different sites. Thus, data were analyzed for patterns of variation with respect to slope aspect and population. Quercus prinus trees growing on south-facing slopes had significantly greater amounts of leaf tannins than those on north-facing slopes but did not exhibit significant population differences in foliar tannin content. In contrast, Q. velutina trees on north- and south-facing slopes did not differ significantly in foliar tannin content but did exhibit significant population differences in foliar tannin content. Different species may have varying responses to the environmental stress associated with topography. Environment may have a considerable effect on leaf tannin content at the landscape scale. However, in some cases, populations may also contribute to variation and need to be considered when evaluating patterns of secondary plant metabolite distribution and/or plant-animal interactions.
{"title":"Patterns of leaf tannin variation in chestnut oak (Quercus prinus) and black oak (Quercus velutina) with respect to topography in a southeastern Ohio oak-hickory forest1","authors":"J. Reed, B. Mccarthy, J. Reed, B. Mccarthy","doi":"10.2307/2996800","DOIUrl":"https://doi.org/10.2307/2996800","url":null,"abstract":"in low light and high nutrient environments. To test this hypothesis, we evaluated the patterns of leaf tannin chemistry in two species of oak (Quercus velutina L. and Q. prinus L.) utilizing protein precipitation methods. Leaves were sampled from mature, forest-grown, canopy trees found in a southeastern Ohio oak-hickory forest. To evaluate the effects of environment, we sampled along a natural gradient using trees from contrasting northand south-facing slopes. To assess the patterns of variation in tannin abundance among populations, we sampled multiple trees from three different sites. Thus, data were analyzed for patterns of variation with respect to slope aspect and population. Quercus prinus trees growing on south-facing slopes had significantly greater amounts of leaf tannins than those on north-facing slopes but did not exhibit significant population differences in foliar tannin content. In contrast, Q. velutina trees on north- and south-facing slopes did not differ significantly in foliar tannin content but did exhibit significant population differences in foliar tannin content. Different species may have varying responses to the environmental stress associated with topography. Environment may have a considerable effect on leaf tannin content at the landscape scale. However, in some cases, populations may also contribute to variation and need to be considered when evaluating patterns of secondary plant metabolite distribution and/or plant-animal interactions.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411430","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}
CHAMBERLIN, E. A. AND L. W AARSSEN. (Department of Biology, Queen's University, Kingston, ON, Canada K7L 3N6). The cost of apical dominance in white pine (Pinus strobus L.): Growth in multi-stemmed versus single-stemmed trees. Bull. Torrey Bot. Club 123: 268-272. 1996-White pine (Pinus strobus L.) normally has a single main stem extending the full height of the tree. Multi-stemmed trees however are occassionally formed following destruction of the terminal shoot, usually by stem-boring insects, which releases lateral shoots from apical dominance. With resources being channelled into more than one main 'sink,' multi-stemmed trees may be able to display greater photosynthetic surface area. Thus, we tested whether or not multi-stemmed trees had overcompensated for terminal shoot damage. Based on a survey of mature pine forest in eastern Ontario, Canada, multi-stemmed trees of a given age had shorter heights but greater trunk diameters and greater stem volumes than single-stemmed trees. Hence, multi-stemmed trees appear to be capable of overcompensating for terminal shoot damage, suggesting that there is a potential fitness cost of apical dominance (in terms of biomass production).
{"title":"The cost of apical dominance in white pine (Pinus strobus L.) : Growth in multi-stemmed versus single-stemmed trees","authors":"Elizabeth A. Chamberlin, L. Aarssen","doi":"10.2307/2996774","DOIUrl":"https://doi.org/10.2307/2996774","url":null,"abstract":"CHAMBERLIN, E. A. AND L. W AARSSEN. (Department of Biology, Queen's University, Kingston, ON, Canada K7L 3N6). The cost of apical dominance in white pine (Pinus strobus L.): Growth in multi-stemmed versus single-stemmed trees. Bull. Torrey Bot. Club 123: 268-272. 1996-White pine (Pinus strobus L.) normally has a single main stem extending the full height of the tree. Multi-stemmed trees however are occassionally formed following destruction of the terminal shoot, usually by stem-boring insects, which releases lateral shoots from apical dominance. With resources being channelled into more than one main 'sink,' multi-stemmed trees may be able to display greater photosynthetic surface area. Thus, we tested whether or not multi-stemmed trees had overcompensated for terminal shoot damage. Based on a survey of mature pine forest in eastern Ontario, Canada, multi-stemmed trees of a given age had shorter heights but greater trunk diameters and greater stem volumes than single-stemmed trees. Hence, multi-stemmed trees appear to be capable of overcompensating for terminal shoot damage, suggesting that there is a potential fitness cost of apical dominance (in terms of biomass production).","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996774","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411005","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}
Ola Karis, R. M. King, Paul C. Janaske, D. Lellinger
{"title":"Cassini on Compositae II and III.","authors":"Ola Karis, R. M. King, Paul C. Janaske, D. Lellinger","doi":"10.2307/2996074","DOIUrl":"https://doi.org/10.2307/2996074","url":null,"abstract":"","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68403007","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}
{"title":"Vegetation in Eastern North America.","authors":"S. Ware, A. Miyawaki, K. Iwatsuki, M. Grandtner","doi":"10.2307/2996077","DOIUrl":"https://doi.org/10.2307/2996077","url":null,"abstract":"","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68403058","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}
{"title":"Atlas of the Orchids of Long Island, New York","authors":"E. Lamont","doi":"10.2307/2996073","DOIUrl":"https://doi.org/10.2307/2996073","url":null,"abstract":"","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402964","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}
{"title":"Wood Anatomy of Plumbaginaceae","authors":"S. Carlquist, Colby J. Boggs","doi":"10.2307/2996071","DOIUrl":"https://doi.org/10.2307/2996071","url":null,"abstract":"","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402940","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}
Dennis S. Anderson, R. B. Davis, S. C. Rooney, C. Campbell, S. C. Rooney, C. Campbell
ANDERSON, D. S., R. B. DAVIS, S. C. ROONEY, AND C. S. CAMPBELL. (Department of Plant Biology and Pathology University of Maine, Orono, ME 04469-5722). The ecology of sedges (Cyperaceae) in Maine peatlands. Bull. Torrey Bot. Club 123: 100-110. 1996.-Sedges (Cyperaceae) are the most important family of vascular plants in terms of species richness on Maine peatlands. Carex has more species than any other genus including Sphagnum in these peatlands. Optima (abundance weighted means) and tolerances (abundance weighted standard deviations) of pH, Ca, and shade are given for the 21 most frequently occurring sedge species. These species are also characterized in terms of habitat (vegetation type). Most of the species occur in the open, but a few (e.g., Carex trisperma) are most abundant in wooded habitats. Eriophorum species characterize bog and poor fen habitats. The rarest peatland sedges are all calciphiles. Canonical correspondence analysis with forward selection entered shade, pH, Al, a climate factor, K, Ca, Fe, and Mg as the minimum number of variables which best account for the species distributions. Sedge distributions within this region are determined primarily by gradients of shade and alkalinity/base cations. A comparison with other studies from boreal North American peatlands reveals that ecological requirements can differ across a sedge species' range.
{"title":"The ecology of sedges (Cyperaceae) in Maine peatlands\" 2","authors":"Dennis S. Anderson, R. B. Davis, S. C. Rooney, C. Campbell, S. C. Rooney, C. Campbell","doi":"10.2307/2996067","DOIUrl":"https://doi.org/10.2307/2996067","url":null,"abstract":"ANDERSON, D. S., R. B. DAVIS, S. C. ROONEY, AND C. S. CAMPBELL. (Department of Plant Biology and Pathology University of Maine, Orono, ME 04469-5722). The ecology of sedges (Cyperaceae) in Maine peatlands. Bull. Torrey Bot. Club 123: 100-110. 1996.-Sedges (Cyperaceae) are the most important family of vascular plants in terms of species richness on Maine peatlands. Carex has more species than any other genus including Sphagnum in these peatlands. Optima (abundance weighted means) and tolerances (abundance weighted standard deviations) of pH, Ca, and shade are given for the 21 most frequently occurring sedge species. These species are also characterized in terms of habitat (vegetation type). Most of the species occur in the open, but a few (e.g., Carex trisperma) are most abundant in wooded habitats. Eriophorum species characterize bog and poor fen habitats. The rarest peatland sedges are all calciphiles. Canonical correspondence analysis with forward selection entered shade, pH, Al, a climate factor, K, Ca, Fe, and Mg as the minimum number of variables which best account for the species distributions. Sedge distributions within this region are determined primarily by gradients of shade and alkalinity/base cations. A comparison with other studies from boreal North American peatlands reveals that ecological requirements can differ across a sedge species' range.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402787","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}
plots for two years at one site and four years at the other. We analyzed differences between treatment and control in recruitment, survival, individual growth and fecundity separately. Estimates of equilibrium population growth (X) were obtained from matrix projection models to evaluate the overall competitive effects of C. maculosa on A. fecunda. Over the course of the study X was significantly higher in treatment plots compared to controls, indicating that C. maculosa had a negative effect on A. fecunda populations. Recruitment was significantly higher in treatment plots during the first two years of the study. Survival, growth and fecundity did not differ between treatment and control. These results indicate that the main effect of removing C. maculosa on populations of A. fecunda was enhanced recruitment resulting from increased seedling establishment. Competitive effects of C. maculosa on A. fecunda varied between sites and among years, indicating that long-term studies are required to fully understand the effects of competition on population dynamics.
{"title":"Competitive effects of Centaurea maculosa on the population dynamics of Arabis fecunda1","authors":"P. Lesica, J. Shelly, J. Shelly","doi":"10.2307/2996068","DOIUrl":"https://doi.org/10.2307/2996068","url":null,"abstract":"plots for two years at one site and four years at the other. We analyzed differences between treatment and control in recruitment, survival, individual growth and fecundity separately. Estimates of equilibrium population growth (X) were obtained from matrix projection models to evaluate the overall competitive effects of C. maculosa on A. fecunda. Over the course of the study X was significantly higher in treatment plots compared to controls, indicating that C. maculosa had a negative effect on A. fecunda populations. Recruitment was significantly higher in treatment plots during the first two years of the study. Survival, growth and fecundity did not differ between treatment and control. These results indicate that the main effect of removing C. maculosa on populations of A. fecunda was enhanced recruitment resulting from increased seedling establishment. Competitive effects of C. maculosa on A. fecunda varied between sites and among years, indicating that long-term studies are required to fully understand the effects of competition on population dynamics.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402823","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：