New Journal of Botany最新文献_第7页

A new name for a hybrid Salicornia (Amaranthaceae) 杂交种苋属(苋科)的新名称

New Journal of Botany Pub Date : 2015-09-01 DOI: 10.1179/2042349715Y.0000000013

C. Stace

引用次数: 0

Common plants as indicators of habitat suitability for rare plants; quantifying the strength of the association between threatened plants and their neighbours 普通植物对珍稀植物生境适宜性的指示作用量化受威胁植物与其邻居之间的联系强度

New Journal of Botany Pub Date : 2015-09-01 DOI: 10.1179/2042349715Y.0000000011

S. Smart, S. Jarvis, Kevin J. Walker, P. Henrys, O. Pescott, R. Marrs

{"title":"Common plants as indicators of habitat suitability for rare plants; quantifying the strength of the association between threatened plants and their neighbours","authors":"S. Smart, S. Jarvis, Kevin J. Walker, P. Henrys, O. Pescott, R. Marrs","doi":"10.1179/2042349715Y.0000000011","DOIUrl":"https://doi.org/10.1179/2042349715Y.0000000011","url":null,"abstract":"Abstract Rare plants are vulnerable to environmental change but easy to over-look during survey. Methods are therefore needed that can provide early warnings of population change and identify potentially suitable vegetation that could support new or previously overlooked populations. We developed an indicator species approach based on quantifying the association between rare plants across their British ecological range and their suite of more common neighbours. We combined quadrat data, targeted on six example species selected from the Botanical Society of Britain and Ireland's Threatened Plant Project (TPP), with representative survey data from across Britain. Bayes Theorem was then used to calculate the probability that the rare species would occur given the presence of an associated species that occurred at least once with the rare species in the TPP quadrats. These values can be interpreted as indicators of habitat suitability rather than expectations of species presence. Probability values for each neighbour species are calculated separately and are therefore unaffected by biased recording of other species. The method can still be applied if only a subset of species is recorded, for example, where weaker botanists record a pre-selected subset of more easily identifiable neighbour species. Disadvantages are that the method is constrained by the availability of quadrats currently targeted on rare species and results are influenced by any recording biases associated with existing quadrat data.","PeriodicalId":19229,"journal":{"name":"New Journal of Botany","volume":"133 1","pages":"72 - 88"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86728930","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: 5

Scanning electron micrographs of leaves of British Carex species, 5. Subgenus Carex: sections Spirostachyae, Digitatae Mitratae Acrocystis Rhychocystis, Rhomboidales and Aulocystis 英国苔属植物叶片的扫描电镜图。毛苔亚属:分螺旋体毛苔亚科、长趾毛苔亚科、长尾毛苔亚科、长尾毛苔亚科和长尾毛苔亚科

New Journal of Botany Pub Date : 2015-09-01 DOI: 10.1179/2042349715Y.0000000014

M. Proctor, M. Bradshaw

引用次数: 0

What is the origin of the Scottish populations of the European endemic Cherleria sedoides (Caryophyllaceae)? 欧洲特有的雪梨属(石竹科)的苏格兰种群的起源是什么?

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000002

F. Valtueña, M. Dillenberger, J. Kadereit, A. Moore, C. Preston

{"title":"What is the origin of the Scottish populations of the European endemic Cherleria sedoides (Caryophyllaceae)?","authors":"F. Valtueña, M. Dillenberger, J. Kadereit, A. Moore, C. Preston","doi":"10.1179/2042349715Y.0000000002","DOIUrl":"https://doi.org/10.1179/2042349715Y.0000000002","url":null,"abstract":"Abstract Cherleria sedoides L. (Minuartia sedoides (L.) Hiern) is a montane perennial which, with some species in Minuartia sect. Spectabiles, is more closely related to Scleranthus than to other Minuartia species and is therefore best restored to the reinstated and redefined genus Cherleria. Reconstruction of the ancestral area of the clade containing C. sedoides suggests that it evolved in the Alps or the Balkan peninsula. The species now has an unusual distribution, being present in the mountains of southern Europe and Scotland but absent from the Arctic. Three historical scenarios that might have led to the presence of the species in Scotland are outlined and tested by a molecular analysis comparing Scottish populations with populations from the Pyrenees and the Alps. The sampled populations show little variation in internal transcribed spacer (ITS)/external transcribed spacer (ETS) but much more in cpDNA. The latter reveals a major division between some Alpine material and the other Alpine, Pyrenean and Scottish plants. Once the anomalous Alpine haplotypes are excluded, Scottish populations are at least as variable as those from the Alps and Pyrenees, and are closely related to both. We conclude that they have not undergone a long period of isolation, nor have they originated by recent, long-distance dispersal from the Alps or Pyrenees. They appear to be derived from a metapopulation that was probably widespread at the last glacial maximum (LGM) and gave rise to the Alpine, Pyrenean and Scottish plants.","PeriodicalId":19229,"journal":{"name":"New Journal of Botany","volume":"93 1","pages":"13 - 25"},"PeriodicalIF":0.0,"publicationDate":"2015-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80471996","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

Two new Scottish species of Hieracium (Asteraceae) 苏格兰石菖蒲属二新种(菊科)

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000004

D. J. Mccosh

引用次数: 0

Changes in the vegetation of clear-fells and closed canopy stands in an English oak wood over a 30-year period 在英国栎树林中，阔叶林和封闭树冠林的植被在30年间的变化

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000001

K. Kirby

{"title":"Changes in the vegetation of clear-fells and closed canopy stands in an English oak wood over a 30-year period","authors":"K. Kirby","doi":"10.1179/2042349715Y.0000000001","DOIUrl":"https://doi.org/10.1179/2042349715Y.0000000001","url":null,"abstract":"Abstract The vascular plant ground flora of clear-felled and undisturbed oak stands were studied using 10 m × 10 m temporary and permanent plots over a 30-year period in a wood in southern England. Within the undisturbed stands, the mean species richness declined from 10 to 15 species per plot in 1981 to about five in 2012. The decline was correlated with a decrease in openness of the tree and shrub layer over this period. In the clear-fells, the species richness in the first two growing seasons after felling was 1.5 to 3 times higher than in the undisturbed stands. Ruderal species and grasses in particular increased, but some ancient woodland indicators (AWI) were present, even after a decade of openness. Change in the openness of stands appears to be a strong driver of ground flora richness up to about 50% cover; in more open conditions, competition and other processes within the ground flora assemblage may come to play a greater part. Forest management has played a key role in creating canopy gaps in small ancient woods in Britain but, in future, tree deaths from disease and extreme weather events are likely to increase in importance.","PeriodicalId":19229,"journal":{"name":"New Journal of Botany","volume":"15 1","pages":"12 - 2"},"PeriodicalIF":0.0,"publicationDate":"2015-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82410470","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

Scanning electron micrographs of leaves of British Carex species, 4. Subgenus Carex: sections Paludosae, Porocystis, Atratae, Paniceae, Pachystylae, Glaucae, Ceratocystis and Strigosae

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000007

M. Proctor, M. Bradshaw

{"title":"Scanning electron micrographs of leaves of British Carex species, 4. Subgenus Carex: sections Paludosae, Porocystis, Atratae, Paniceae, Pachystylae, Glaucae, Ceratocystis and Strigosae","authors":"M. Proctor, M. Bradshaw","doi":"10.1179/2042349715Y.0000000007","DOIUrl":"https://doi.org/10.1179/2042349715Y.0000000007","url":null,"abstract":"Abstract This part includes about a third of the large Subgenus Carex, embracing sections Paludosae, Porocystis, Paniceae, Pachystylae, Ceratocystis and Strigosae. These are mostly plants of unwooded habitats, although C. pallescens (section Porocystis) is often associated with woods, and C. sylvatica and C. strigosa (section Strigosae) are characteristically woodland plants. At least three of the sections in this part (Atratae, Paniceae, Ceratocystis) appear to be natural on morphological and molecular criteria. As in subgenus Vignea, micromorphology clearly differentiates between several species-pairs (acutiformis/riparia, panicea/vaginata, hostiana/flava-group), but makes only a limited contribution at sectional level. Carex pallescens is closely linked with C. acutiformis in molecular analyses. Carex filiformis seems to have its phyletic affinities with Paniceae rather than with Acrocystis. In Ceratocystis, C. hostiana is clearly marked off by its papillose lower leaf surface from the C. flava group which, though variable, appear to be substantially uniform micromorphologically. Carex sylvatica has a close link with Ceratocystis in molecular analyses. As in subgenus Vignea, many species, particularly in the flava group and Strigosae, show minor variations on a common pattern, the ‘default caricoid leaf’.","PeriodicalId":19229,"journal":{"name":"New Journal of Botany","volume":"23 1","pages":"45 - 58"},"PeriodicalIF":0.0,"publicationDate":"2015-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82421901","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

Geum × convallis (G. macrophyllum × G. urbanum, Rosaceae): a new Geum hybrid from England

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000003

M. Wilcox

引用次数: 1

Some observations on the Carex muricata group with especial reference to the identification and definition of C. divulsa subsp. leersii (Cyperaceae) 关于村苔属植物的一些观察，特别是关于村苔属植物的鉴定和定义。leersii(莎草科)

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000005

R. Leaney

引用次数: 0

Polyploid wild service tree: first record of a triploid Sorbus torminalis (Rosaceae) in Britain 多倍体野生服务树:英国首次记录的三倍体鸢尾(蔷薇科)

New Journal of Botany Pub Date : 2015-04-01 DOI: 10.1179/2042349715Y.0000000006

Tracey J. Hamston, Jaume Pellicer, Michael F. Fay

引用次数: 3