Germination requirements and seed mass of slow- and fast-colonizing temperate forest herbs along a latitudinal gradient

被引：33

作者：

Graae, Bente J. ^{[1
]}

Verheyen, Kris ^{[2
]}

Kolb, Annette ^{[3
]}

Van Der Veken, Sebastian ^{[4
]}

Heinken, Thilo ^{[5
]}

Chabrerie, Olivier ^{[6
]}

Diekmann, Martin ^{[3
]}

Valtinat, Karin ^{[7
]}

Zindel, Renate ^{[1
]}

Karlsson, Elisabeth ^{[1
]}

Strom, Lotta ^{[1
]}

Decocq, Guillaume ^{[6
]}

Hermy, Martin ^{[4
]}

Baskin, Carol C. ^{[8
,9
]}

机构：

[1] Umea Univ, Dept Ecol & Environm Sci, Climate Impacts Res Ctr, SE-98107 Abisko, Sweden

[2] Univ Ghent, Lab Forestry, B-9090 Melle Gontrode, Belgium

[3] Univ Bremen, Dept Biol & Chem, D-28359 Bremen, Germany

[4] Katholieke Univ Leuven, Div Forest Nat & Landscape, B-3001 Louvain, Belgium

[5] Univ Potsdam, D-14469 Potsdam, Germany

[6] Univ Picardie Jules Verne, Plant Biodivers Lab, F-80037 Amiens, France

[7] Lund Univ, Dept Ecol, SE-22362 Lund, Sweden

[8] Univ Kentucky, Dept Biol, Lexington, KY 40506 USA

[9] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40506 USA

来源：

ECOSCIENCE | 2009年 / 16卷 / 02期

基金：

比利时弗兰德研究基金会;

关键词：

ancient forest; climate change; plant migration; Reid's paradox; seed development; seed dormancy; PLANT MIGRATION; DISPERSAL; ANCIENT; RECRUITMENT; LIMITATION; CONTINUITY; VEGETATION; FRAGMENTATION; COLONIZATION; LANDSCAPE;

D O I：

10.2980/16-2-3234

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Predictions on displacement of suitable habitats due to climate change suggest that plant species with poor colonization ability may be unable to move fast enough to match forecasted climate-induced changes in habitat distribution. However, studies on early Holocene plant migration show fast migration of many plant species that are poor colonizers today We hypothesize that warmer temperatures during the early Holocene yielded higher seed quality, contributing to explaining the fast migration. We studied how the 3 seed quality variables, seed mass, germinability, and requirements for break of seed dormancy, vary for seeds of 11 forest herb species with varying colonization capacity collected along a 1400-km latitudinal gradient. Within species, seed mass showed a positive correlation with latitude, whereas germinability was more positively correlated with temperature (growing degree hours obtained at time of seed collection). Only slow-colonizing species increased germinability with temperature, whereas only fast-colonizing species increased germinability with latitude. These interactions were only detectable when analyzing germinability of the seeds, even though this trait and seed mass were correlated. The requirement for dormancy break did not correlate with latitude or temperature. The results indicate that seed development of slow colonizers may be favoured by a warmer climate, which in turn may be important for their migration capacity.

引用

页码：248 / 257

页数：10