本文選題：不同草地類型 + 物種多度分布格局　； 參考：《中國(guó)草地學(xué)報(bào)》2017年05期

【摘要】：以內(nèi)蒙古三種不同草地類型為研究對(duì)象,通過野外植被調(diào)查,按照不同功能群將草地植物進(jìn)行劃分,并應(yīng)用生態(tài)位重疊模型(ONM)、生態(tài)位優(yōu)先占領(lǐng)模型(NPM)、斷棍模型(BSM)、優(yōu)勢(shì)優(yōu)先模型(DPM)和隨機(jī)分配模型(RAM)與群落植物物種進(jìn)行擬合,按照擬合程度分析草甸草原、典型草原和荒漠草原三種不同草地類型植物群落物種多度分布格局。結(jié)果表明:斷棍模型可以較好地?cái)M合荒漠草原(χ~2=224.18,AIC=277.05,BIC=281.16)和草甸草原(χ~2=186.57,AIC=303.13,BIC=307.53)植物群落植物多度格局,而典型草原的群落植物真實(shí)多度與生態(tài)位優(yōu)先占領(lǐng)模型(χ~2=22.29,AIC=246.17,BIC=250.27)吻合度高。在不同草地群落中,生長(zhǎng)季降水量的多少對(duì)多度格局起關(guān)鍵作用,生長(zhǎng)季明顯的降水量變化會(huì)對(duì)草地群落造成影響,但建群種的優(yōu)勢(shì)地位不會(huì)發(fā)生改變。
[Abstract]:Taking three different grassland types in Inner Mongolia as the research object, grassland plants were divided according to different functional groups through field vegetation investigation. The niche overlap model (ONMN), niche priority occupation model (NPM), BSMN model, dominant priority model (DPMM) and random allocation model (Ram) were used to fit the plant species. The meadow grassland was analyzed according to the fitting degree. Species abundance distribution pattern of three different grassland types in typical steppe and desert steppe. The results showed that the model could fit the plant abundance pattern of desert steppe (蠂 ~ (224.18) ~ (18) AICI ~ (277.05) and meadow steppe (蠂 ~ (2) 186.57 ~ (7) AIC-303.13BIC-307.53), and the true plant abundance of typical grassland was in good agreement with the niche priority occupation model (蠂 ~ (22. 29) AICI ~ (246.17) BIC ~ (250.27). In different grassland communities, the amount of precipitation in growing season plays a key role in the abundance pattern. The obvious precipitation change in growing season will affect the grassland community, but the dominant position of the species will not change.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)草原與資源環(huán)境學(xué)院;
【基金】：內(nèi)蒙古溫性草原牧區(qū)“生產(chǎn)生態(tài)生活”優(yōu)化保障技術(shù)集成與示范(2012BAD13B02) 牧區(qū)優(yōu)質(zhì)高效飼草生產(chǎn)利用技術(shù)研究示范項(xiàng)目(201003024)
【分類號(hào)】：S812

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 吳淼;;邁克和小子[J];寵物世界(貓迷);2013年07期

相關(guān)碩士學(xué)位論文 前1條

1 李�，�;放牧對(duì)松嫩草地蝗蟲多度及生產(chǎn)性能的影響[D];東北師范大學(xué);2014年

，

本文編號(hào)：2018329