国产bbaaaaa片,成年美女黄网站色视频免费,成年黄大片,а天堂中文最新一区二区三区,成人精品视频一区二区三区尤物

首頁> 外文OA文獻 >Effects of Endophyte Infection in Tall Fescue (Festuca arundinacea: Poaceae) on Community Diversity
【2h】

Effects of Endophyte Infection in Tall Fescue (Festuca arundinacea: Poaceae) on Community Diversity

機譯：高羊茅內(nèi)生真菌感染（Festuca Arundinacea：禾本科）對群落多樣性的影響

代理獲取
本網(wǎng)站僅為用戶提供外文OA文獻查詢和代理獲取服務(wù)，本網(wǎng)站沒有原文。下單后我們將采用程序或人工為您竭誠獲取高質(zhì)量的原文，但由于OA文獻來源多樣且變更頻繁，仍可能出現(xiàn)獲取不到、文獻不完整或與標題不符等情況，如果獲取不到我們將提供退款服務(wù)。請知悉。
  • 摘要
  • 著錄項
  • 相似文獻
  • 相關(guān)主題

摘要

Recent studies have suggested that the presence of endophytes in tall fescue can lead to decreased species richness in the associated plant community. To assess the generality of this hypothesis, a field study tested the effects of endophyte infection on a 3-yr-old successional field dominated by Festuca arundinacea. The potential importance of endophyte infection relative to other environmental factors was tested by including two additional treatments: the effects of soil fertility and mowing. Contrary to previous studies, a positive relationship was found between endophyte infection frequency and diversity (N = 23, F = 5.23, R2 = 0.19, P u3c 0.03). A strong interaction was found between the mowing treatment and endophyte infection frequency in predicting diversity (N = 22, F = 36.1, R2 = 0.84, P u3c 0.0001), where the maximum species richness was present in plots that were both mowed and highly endophyte infected. The relationship between endophytes and diversity varied through the successional continuum (the mowing treatments) but was generally positive. The soil in mowed plots was drier than in unmowed plots (t = 2.1, df = 28, P u3c 0.05). We suggest that heavy mowing decreases soil moisture levels enough to reduce the interspecific competitive ability of infected F. arundinacea, thereby promoting local diversity. Endophyte presence is important, but the previously reported negative relationship between endophyte infection and community diversity is probably overly simplistic in complex ecological settings.
機譯：最近的研究表明，高羊茅內(nèi)生菌的存在會導(dǎo)致相關(guān)植物群落物種豐富度下降。為了評估該假設(shè)的普遍性，一項野外研究測試了內(nèi)生菌感染對以3年生硬羊茅（Festuca arundinacea）為主的3歲繼承演替場的影響。相對于其他環(huán)境因素而言，內(nèi)生菌感染的潛在重要性通過包括兩種其他處理方法進行了測試：土壤肥力和割草的影響。與以前的研究相反，發(fā)現(xiàn)內(nèi)生菌感染的頻率與多樣性呈正相關(guān)（N = 23，F(xiàn) = 5.23，R2 = 0.19，P u3c 0.03）。在預(yù)測多樣性的過程中，割草處理與內(nèi)生菌感染頻率之間存在很強的相互作用（N = 22，F(xiàn) = 36.1，R2 = 0.84，P u3c 0.0001），其中最大的物種豐富度出現(xiàn)在被修剪和高度修剪的地塊中內(nèi)生菌感染。內(nèi)生植物和多樣性之間的關(guān)系在演替連續(xù)過程（割草處理）中有所不同，但通常是積極的。耕地的土壤比未耕地的土壤更干燥（t = 2.1，df = 28，P <0.05）。我們建議，重型割草可降低土壤水分含量，足以降低感染的金絲雀（F. arundinacea）的種間競爭能力，從而促進局部多樣性。內(nèi)生菌的存在很重要，但是以前報道的內(nèi)生菌感染與群落多樣性之間的負相關(guān)關(guān)系在復(fù)雜的生態(tài)環(huán)境中可能過于簡單。

著錄項

相似文獻

  • 外文文獻
  • 中文文獻
  • 專利
代理獲取

客服郵箱：kefu@zhangqiaokeyan.com

京公網(wǎng)安備：11010802029741號 ICP備案號：京ICP備15016152號-6 六維聯(lián)合信息科技 (北京) 有限公司?版權(quán)所有

  • 客服微信

  • 服務(wù)號