Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/jbi.12480 |
Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms | |
Fragniere, Yann1; Betrisey, Sebastien2,3,4; Cardinaux, Leonard1; Stoffel, Markus5,6; Kozlowski, Gregor1,2,3 | |
通讯作者 | Kozlowski, Gregor |
来源期刊 | JOURNAL OF BIOGEOGRAPHY
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ISSN | 0305-0270 |
EISSN | 1365-2699 |
出版年 | 2015 |
卷号 | 42期号:5页码:809-820 |
英文摘要 | AimGymnosperms are often described as a marginal and threatened group, members of which tend to be out-competed by angiosperms and which therefore preferentially persist at higher latitudes and elevations. The aim of our synthesis was to test these statements by investigating the global latitudinal and elevational distribution of gymnosperms, as well as their conservation status, using all extant gymnosperm groups (cycads, gnetophytes, ginkgophytes and conifers). LocationWorldwide. MethodsWe developed a database of 1014 species of gymnosperms containing latitudinal and elevational distribution data, as well as their global conservation status, as described in the literature. The 1014 species comprised 305 cycads, 101 gnetophytes, the only living representative of ginkgophytes, and 607 conifers. Generalized additive models, frequency histograms, kernel density estimations and distribution maps based on Takhtajan’s floristic regions were used. ResultsAlthough the diversity of gymnosperms decreases at equatorial latitudes, approximately 50% of the extant species occur primarily between the tropics. More than 43% of gymnosperms can occur at very low elevations (200m a.s.l.). Gymnosperms, considering all species together as well as their main taxonomic groups separately, do not exhibit a latitudinal diversity gradient as commonly observed for many other taxa. Gymnosperms, and especially conifers, are on average less threatened at higher and equatorial latitudes. Main conclusionsGymnosperms display an unusual latitudinal diversity gradient, which we suggest cannot fully be accounted for by angiosperm dominance and competitive superiority. We hypothesize that other factors explain their present distribution, such as the development of centres of endemism in several regions and the adaptation of certain taxa to cold and arid climates. |
英文关键词 | Angiosperm domination conifers cycads Ginkgo global diversity patterns elevational distribution gnetophytes latitudinal distribution latitudinal diversity gradient |
类型 | Review |
语种 | 英语 |
国家 | Switzerland |
收录类别 | SCI-E |
WOS记录号 | WOS:000352793700001 |
WOS关键词 | LATITUDINAL DIVERSITY GRADIENT ; WELWITSCHIA-MIRABILIS ; EVOLUTIONARY DYNAMICS ; ANGIOSPERM DOMINANCE ; EXTANT GYMNOSPERMS ; SPECIES-DIVERSITY ; PLANT DIVERSITY ; PATTERNS ; CONIFER ; BIOGEOGRAPHY |
WOS类目 | Ecology ; Geography, Physical |
WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188440 |
作者单位 | 1.Nat Hist Museum, CH-1700 Fribourg, Switzerland; 2.Univ Fribourg, Dept Biol, CH-1700 Fribourg, Switzerland; 3.Univ Fribourg, Bot Garden, CH-1700 Fribourg, Switzerland; 4.Univ Fribourg, Dept Geosci, Conservat Biogeog, CH-1700 Fribourg, Switzerland; 5.Univ Bern, Inst Geol Sci, Dendrolab Ch, CH-3012 Bern, Switzerland; 6.Univ Geneva, Inst Environm Sci Climat Change & Climate Impacts, CH-1227 Carouge, Switzerland |
推荐引用方式 GB/T 7714 | Fragniere, Yann,Betrisey, Sebastien,Cardinaux, Leonard,et al. Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms[J],2015,42(5):809-820. |
APA | Fragniere, Yann,Betrisey, Sebastien,Cardinaux, Leonard,Stoffel, Markus,&Kozlowski, Gregor.(2015).Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms.JOURNAL OF BIOGEOGRAPHY,42(5),809-820. |
MLA | Fragniere, Yann,et al."Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms".JOURNAL OF BIOGEOGRAPHY 42.5(2015):809-820. |
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