本文選題：溫帶草地 + 物種豐富度�。� 參考：《內(nèi)蒙古大學(xué)》2016年碩士論文

【摘要】：作為生態(tài)學(xué)研究的重要內(nèi)容,植物多樣性與生產(chǎn)力關(guān)系的時空動態(tài),群落組成動態(tài)變化以及物種周轉(zhuǎn)的研究備受關(guān)注。我們在2012-2015年對前期(2007年)在內(nèi)蒙古不同草原區(qū)定位標(biāo)記的23個草地群落進(jìn)行了重采樣調(diào)查,擬分析不同的草地植物群落組成、以及植物多樣性的動態(tài)變化及其對植被生產(chǎn)力的影響,主要研究結(jié)果表明：(1)地上生產(chǎn)力(ANPP)具有較大的年際間變異(CVANPP=42.9%),而植物多樣性的變異較小,且荒漠草原的年際間變異比典型草原和草甸草原偏高。在空間尺度上,地上生產(chǎn)力(ANPP)-多樣性(SR,H’)之間表現(xiàn)為顯著正相關(guān)關(guān)系,而與均勻度指數(shù)(J)無關(guān),空間上的ANPP-SR正相關(guān)關(guān)系在不同年份變化不大。(2)對植物群落功能群組成隨時間的變化研究結(jié)果表明：不同草地中C3、C4植物的貢獻(xiàn)存在差異,不同年份,C3植物對草地生產(chǎn)力的貢獻(xiàn)平均在50%之上,高于C4植物；C3植物物種豐富度是C4植物的2-4倍之多。功能群相對生物量比重表現(xiàn)為多年生禾草多年生雜類草一、二年生植物灌木/半灌木,但生物量變異卻完全相反,灌木/半灌木一、二年生植物多年生雜類草多年生禾草。生長季溫度降水對各功能群相對生物量(除一、二年生植物外)無顯著影響,但多年生禾草與雜類草的物種豐富度與生長季降水呈正相關(guān),與生長季溫度呈負(fù)相關(guān)。一、二年生植物隨時間波動最大,其相對生物量與生長季降水負(fù)相關(guān)。(3)對物種周轉(zhuǎn)的年際間變化研究結(jié)果表明：三種草地類型物種增長率,物種丟失率和物種周轉(zhuǎn)率無顯著差異；物種周轉(zhuǎn)率年際間無明顯差異；物種周轉(zhuǎn)率隨著物種豐富度的增加而增加；氣候調(diào)節(jié)物種周轉(zhuǎn)是通過提高物種增長率,降低物種丟失率來實現(xiàn)的。
[Abstract]:As an important part of ecological research, the research on the relationship between plant diversity and productivity, community composition and species turnover has attracted much attention. We conducted a resampling survey of 23 grassland communities located in different grassland regions in Inner Mongolia from 2012 to 2015 to analyze the composition of different grassland plant communities. As well as the dynamic change of plant diversity and its effect on vegetation productivity, the main results showed that the aboveground productivity (ANPP) had a large interannual variation (CVANPP), but the variation of plant diversity was relatively small. The interannual variation of desert steppe is higher than that of typical grassland and meadow grassland. On spatial scale, there was a significant positive correlation between aboveground productivity (ANPP) and diversity (SRH), but no correlation with evenness index (J). The positive correlation of ANPP-SR in space changed little in different years. The results showed that the contribution of C3C4 plants in different grassland was different. The average contribution of C _ 3 plants to grassland productivity in different years was above 50%, higher than that of C _ 3 plant species richness of C _ 4 plants was 2-4 times as much as that of C _ 4 plants. The relative biomass proportion of the functional group was as follows: perennial grasses, biennial plant shrubs / subshrubs, but the biomass variation was completely opposite, shrub / semi-shrub, biennial perennial hybrid perennial grasses. However, the species richness of perennial grasses and hybrid grasses was positively correlated with the precipitation in growing season and negatively correlated with the growth season temperature. The interannual variation of the relative biomass and precipitation in growing season was negative correlation. The results showed that the growth rate of species in three grassland types was higher than that in the other three grassland types, and the interannual variation of species turnover was negative correlation between the relative biomass and precipitation in growing season. There was no significant difference in species loss rate and species turnover rate; there was no significant difference in species turnover rate between years; species turnover rate increased with the increase of species richness; species turnover was regulated by increasing species growth rate. This is achieved by reducing the rate of loss of species.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：S812

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 Stepben Peel;夏亦薺;;溫帶草地的有效利用[J];國外畜牧學(xué).草原與牧草;1987年05期

2 Γ.В.Благовещенский;G.V.Blagoveshchensky;В.Γ.Игловиков;V.G.Iglovikov;王寧;;蘇聯(lián)寒帶和溫帶草地生態(tài)系統(tǒng)的特征及其生產(chǎn)能力[J];國外畜牧學(xué).草原與牧草;1986年01期

3 馬文紅;楊元合;賀金生;曾輝;方精云;;內(nèi)蒙古溫帶草地生物量及其與環(huán)境因子的關(guān)系[J];中國科學(xué)(C輯:生命科學(xué));2008年01期

4 P.R。Ball;J.R.Crush;張麗萍;;關(guān)于增加溫帶草地共生固氮的展望[J];國外畜牧學(xué).草原與牧草;1986年06期

5 周鵬;耿燕;馬文紅;賀金生;;溫帶草地主要優(yōu)勢植物不同器官間功能性狀的關(guān)聯(lián)[J];植物生態(tài)學(xué)報;2010年01期

6 李博,史培軍,林小泉;中國溫帶草地草畜平衡動態(tài)監(jiān)測系統(tǒng)的研究[J];干旱區(qū)資源與環(huán)境;1993年Z1期

7 馬文紅;韓梅;林鑫;任艷林;王志恒;方精云;;內(nèi)蒙古溫帶草地植被的碳儲量[J];干旱區(qū)資源與環(huán)境;2006年03期

8 李博,史培軍,林小泉;我國溫帶草地草畜平衡動態(tài)監(jiān)測系統(tǒng)的研究[J];草地學(xué)報;1995年02期

9 馬建靜;吉成均;韓梅;張婷芳;閆雪東;胡東;曾輝;賀金生;;青藏高原高寒草地和內(nèi)蒙古高原溫帶草地主要雙子葉植物葉片解剖特征的比較研究[J];中國科學(xué):生命科學(xué);2012年02期

10 杜睿,呂達(dá)仁,王庚辰;天然溫帶典型草原N_2O和CH_4通量的時間變化特征[J];自然科學(xué)進(jìn)展;2005年03期

相關(guān)碩士學(xué)位論文 前2條

1 牛霞霞;內(nèi)蒙古溫帶草地植物多樣性，，群落結(jié)構(gòu)組成及地上生產(chǎn)力的時間動態(tài)[D];內(nèi)蒙古大學(xué);2016年

2 李瑾;呼倫貝爾溫帶草地PAR分量變化規(guī)律及FPAR/LAI模型的驗證[D];甘肅農(nóng)業(yè)大學(xué);2010年

本文編號：1982785