Arid
DOI10.1111/jvs.12478
No precipitation legacy effects on above-ground net primary production and species diversity in grazed Mediterranean grassland: a 21-year experiment
Sternberg, Marcelo1; Golodets, Carly1; Gutman, Mario2; Perevolotsky, Avi2; Kigel, Jaime3; Henkin, Zalmen4
通讯作者Sternberg, Marcelo
来源期刊JOURNAL OF VEGETATION SCIENCE
ISSN1100-9233
EISSN1654-1103
出版年2017
卷号28期号:2页码:260-269
英文摘要

QuestionWhat are the controls on biomass production and species diversity in Mediterranean grasslands? Do medium-term (i.e. inter-annual) precipitation legacy effects on biomass production and diversity occur in these grasslands?


LocationKarei Deshe Experimental Range Station, Upper Galilee, northern Israel.


MethodsWe used a long-term (21-r) cattle-grazing experiment in a Mediterranean grassland to search for evidence of precipitation legacies on herbaceous above-ground biomass production and species diversity. Biomass production was measured in two seasonal late grazing treatments, in the winter and at peak vegetative production in the spring, while species diversity was determined at peak production. We used ANCOVA to test the effects of residual biomass, previous year’s stocking density and previous year’s biomass on current biomass production. We ran forward selection and ANCOVA to test for precipitation legacies, using precipitation variables relating to both previous and current year’s rainfall. In addition we examined linear regressions of biomass and species diversity on current year’s precipitation.


ResultsBiomass production and species diversity showed weak to negligible relationships with current year’s precipitation. Biomass production, and to a lesser extent, diversity, were affected by inter-annual fluctuations in growing conditions. However, evidence of inter-annual precipitation legacies were found only for early season biomass production, and not for peak biomass production or species diversity. We found no effect of grazing on biomass production at the onset of the grazing season, regardless of important differences in previous year’s stocking density. Additionally, we found no effect of previous year’s biomass production or stocking density on the following year’s biomass or diversity, but peak biomass production was strongly related to previous year’s residual biomass.


ConclusionsThe lack of an inter-annual precipitation legacy on peak biomass production contributes to a growing body of evidence showing that Mediterranean ecosystems are unique among semi-arid and sub-humid ecosystems, where precipitation legacies play an integral role. Mediterranean ecosystems are unique in their combined long-term high variability in rainfall and long grazing history. This lack of precipitation legacy led to the development of vegetation that is highly resistant to inter-annual fluctuations in growing conditions. We propose that the high resistance contributes to the lack of inter-annual, or medium-term, precipitation legacies on the studied grassland, and may contribute to its persistence under future projected climate change in the region.


英文关键词Biomass production Climate change Climatic variability Diversity Drylands Grazing Mediterranean grassland Precipitation legacies Resistance
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000397559100004
WOS关键词HERBACEOUS VEGETATION ; RAINFALL VARIABILITY ; GRAZING MANAGEMENT ; PLANT-COMMUNITIES ; CLIMATE ; RANGELAND ; DROUGHT ; FIRE ; ECOSYSTEMS ; RESISTANCE
WOS类目Plant Sciences ; Ecology ; Forestry
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
来源机构Hebrew University of Jerusalem
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/200878
作者单位1.Tel Aviv Univ, Dept Mol Biol & Ecol Plants, Wise Fac Life Sci, IL-69978 Tel Aviv, Israel;
2.Agr Res Org, Dept Nat Resources, IL-50250 Bet Dagan, Israel;
3.Hebrew Univ Jerusalem, Inst Plant Sci & Genet, Robert H Smith Fac Agr Food & Environm, IL-76100 Rehovot, Israel;
4.Agr Res Org, Dept Nat Resources, Beef Cattle Sect, Newe Yaar Res Ctr, IL-30095 Ramat Yishay, Israel
推荐引用方式
GB/T 7714
Sternberg, Marcelo,Golodets, Carly,Gutman, Mario,et al. No precipitation legacy effects on above-ground net primary production and species diversity in grazed Mediterranean grassland: a 21-year experiment[J]. Hebrew University of Jerusalem,2017,28(2):260-269.
APA Sternberg, Marcelo,Golodets, Carly,Gutman, Mario,Perevolotsky, Avi,Kigel, Jaime,&Henkin, Zalmen.(2017).No precipitation legacy effects on above-ground net primary production and species diversity in grazed Mediterranean grassland: a 21-year experiment.JOURNAL OF VEGETATION SCIENCE,28(2),260-269.
MLA Sternberg, Marcelo,et al."No precipitation legacy effects on above-ground net primary production and species diversity in grazed Mediterranean grassland: a 21-year experiment".JOURNAL OF VEGETATION SCIENCE 28.2(2017):260-269.
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