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  1. 116 農学生命科学研究科・農学部
  2. 20 生圏システム学専攻
  3. 1162010 学術雑誌論文
  1. 0 資料タイプ別
  2. 10 学術雑誌論文
  3. 014 自然科学

Two-phase functional redundancy in rangelands : Two-phase functional redundancy in plant communities along a grazing gradient in Mongolian rangelands

http://hdl.handle.net/2261/33387
http://hdl.handle.net/2261/33387
9fabe81c-4888-42c8-9d1b-9bae1cdc6d81
名前 / ファイル ライセンス アクション
Ecology_90_9_2598.pdf Ecology_90_9_2598.pdf (215.0 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2010-03-16
タイトル
タイトル Two-phase functional redundancy in rangelands : Two-phase functional redundancy in plant communities along a grazing gradient in Mongolian rangelands
言語
言語 eng
キーワード
主題Scheme Other
主題 arid and semi-arid rangelands
キーワード
主題Scheme Other
主題 ecosystem functioning
キーワード
主題Scheme Other
主題 functional diversity
キーワード
主題Scheme Other
主題 functional redundancy
キーワード
主題Scheme Other
主題 grazing history
キーワード
主題Scheme Other
主題 intermediate disturbance hypothesis
キーワード
主題Scheme Other
主題 Mongolia
キーワード
主題Scheme Other
主題 plant functional trait
キーワード
主題Scheme Other
主題 sigmoid logistic curve
キーワード
主題Scheme Other
主題 species richness
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Sasaki, Takehiro

× Sasaki, Takehiro

WEKO 106656

Sasaki, Takehiro

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Okubo, Satoru

× Okubo, Satoru

WEKO 106657

Okubo, Satoru

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Okayasu, Tomoo

× Okayasu, Tomoo

WEKO 106658

Okayasu, Tomoo

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Jamsran, Undarmaa

× Jamsran, Undarmaa

WEKO 106659

Jamsran, Undarmaa

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Ohkuro, Toshiya

× Ohkuro, Toshiya

WEKO 106660

Ohkuro, Toshiya

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Takeuchi, Kazuhiko

× Takeuchi, Kazuhiko

WEKO 106661

Takeuchi, Kazuhiko

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著者所属
著者所属 Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
著者所属
著者所属 Center for Ecosystem Study, Mongolian State University of Agriculture, Mongolia
抄録
内容記述タイプ Abstract
内容記述 The concept of functional redundancy is at the core of theory relating changes in ecosystem functioning to species loss. However, few empirical studies have investigated the strength and form of the relationship between species and functional diversity (i.e., the presence of functional redundancy in ecological communities) in this context. In particular, we know little about how local extinctions in real communities might impact functional diversity. Here, we examined the relationship between species and functional diversity in plant communities along a grazing gradient across Mongolian rangeland ecosystems. We applied a recently described measure of functional diversity that incorporates species’ dissimilarities defined from plant functional traits and tested several hypothesized forms of the relationship between species and functional diversity using linear and nonlinear modeling techniques. We found a significant sigmoid logistic relationship between species richness and functional diversity in relatively benign environmental conditions. This indicates high functional redundancy at low levels of species richness followed by a rapid increase at intermediate levels, until functional diversity reaches an asymptote at high levels (i.e., two-phase functional redundancy). In contrast, we generally observed a positive linear relationship between these parameters in relatively harsh environmental conditions, indicating low functional redundancy. Observed functional redundancy probably resulted from two factors, intrinsic redundancy in species’ functional traits and extrinsic redundancy caused by nonrandom compositional change that is nonrandom with respect to functional traits. Lack of either intrinsic or extrinsic redundancy may result in low functional redundancy. Two-phase functional redundancy suggests that functional traits are abruptly lost from a community below a certain level of species richness, and a community then shifts into a contrasting state that has a few limited functional groups characterized by disturbance-resistant traits, as a consequence of disturbances such as livestock grazing. This study represents a major step forward in predicting the consequences of livestock grazing on the functioning of Mongolian rangeland ecosystems.
書誌情報 Ecology

巻 90, 号 9, p. 2598-2608, 発行日 2009
ISSN
収録物識別子タイプ ISSN
収録物識別子 0012-9658
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA0063138X
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1890/08-1850.1
権利
権利情報 Copyright by the Ecological Society of America
フォーマット
内容記述タイプ Other
内容記述 application/pdf
著者版フラグ
値 author
日本十進分類法
主題Scheme NDC
主題 290.13
日本十進分類法
主題Scheme NDC
主題 629
出版者
出版者 Ecological Society of America
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