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首頁(yè)> 外文學(xué)位 >Response of desert mule deer to habitat alterations in the lower Sonoran Desert.
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Response of desert mule deer to habitat alterations in the lower Sonoran Desert.

機(jī)譯：索諾蘭沙漠下游沙漠m鹿對(duì)棲息地變化的響應(yīng)。

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About 1,600,000 ha of desert mule deer range in Mexico are currently altered with vegetation clear-cutting and establishment of buffelgrass pastures. Consequently, the availability of important resources as cover and forage from scrub vegetation has been reduced for desert mule deer. No previous research has been conducted to investigate how desert mule deer respond to those alterations. Therefore, the purpose of this research was to examine movements of desert mule deer, evaluate their home range sizes and determine habitat use, and analyze their diets in areas of central and western Sonora, Mexico. The approach involved the use of radiotelemetry techniques and GIS programs to calculate home range sizes, examine selection of vegetation associations, and identify the specific components of habitat that better distinguished the characteristics of selected sites by desert mule deer. I used the microhistological technique to determine botanical components of desert mule deer diets, and compare diets of desert mule deer and cattle in habitat with buffelgrass pastures. Diet analyses included spatial and temporal comparisons of diversity and similarity indices. Sizes of home ranges were larger in the more arid environments of western Sonora (27.3 km2) than in central Sonora (14.5 km 2). Desert mule deer used altered habitat differently than use areas without buffelgrass, however, there was no difference in the size of home ranges of mule deer from inside buffelgrass areas and the size of home ranges of deer in native scrub vegetation. Thermal cover, ground cover, and percent of gravel in the ground were the variables that distinguished locations selected by desert mule deer. Desert mule deer selected xeroriparian vegetation and sites closer to water sources. Water sources may have influenced mule deer to stay in buffelgrass areas despite the lack of cover and forage from shrubs and trees. For diets of mule deer, I identified 96 plant species, 69 of which have not previously been reported as forage for this wild herbivore. Desert mule deer and cattle shared 45 forage species from central Sonora. However, biological overlap of diets occurred only for spring. Results from these studies provide information to understand ecological relationships of desert mule deer on altered habitats.
機(jī)譯：墨西哥目前約有1,600,000公頃的沙漠m鹿范圍被植被清除和水牛草牧場(chǎng)的建立所改變。因此，沙漠rub鹿減少了從灌木植被中獲得的重要資源作為覆蓋物和飼料。以前沒有進(jìn)行過任何研究來(lái)調(diào)查沙漠m對(duì)這些變化的反應(yīng)。因此，本研究的目的是在墨西哥中部和西部的索諾拉地區(qū)檢查沙漠m的運(yùn)動(dòng)，評(píng)估其home的大小并確定棲息地的用途，并分析其飲食。該方法涉及使用無(wú)線電遙測(cè)技術(shù)和GIS程序來(lái)計(jì)算家庭范圍的大小，檢查植被關(guān)聯(lián)的選擇以及確定棲息地的特定組成部分，從而更好地通過沙漠m鹿來(lái)區(qū)分所選地點(diǎn)的特征。我使用顯微組織技術(shù)確定了沙漠ule飼料中的植物成分，并比較了水牛草牧場(chǎng)中生境中沙漠desert和牛的飲食。飲食分析包括多樣性和相似性指數(shù)的時(shí)空比較。在干旱的西部索諾拉（27.3 km2）環(huán)境中，房屋范圍的大小比中部索諾拉（14.5 km 2）大。沙漠m的改變后的棲息地與無(wú)水牛的使用區(qū)不同，但是，水牛草內(nèi)部的m的家園范圍與天然灌木植被中的鹿的家園范圍沒有差異。熱量覆蓋層，地面覆蓋層和地面礫石的百分比是區(qū)分沙漠desert鹿所選擇位置的變量。沙漠ule鹿選擇了干濕地植被和靠近水源的地點(diǎn)。盡管灌木和樹木沒有覆蓋物和草料，但水源可能已經(jīng)影響了ule鹿留在水牛草地區(qū)。對(duì)于s鹿的飲食，我確定了96種植物，以前尚未報(bào)道其中69種為該野生草食動(dòng)物的牧草。沙漠索諾拉中部的m鹿和牲畜共有45種草料。但是，飲食的生物學(xué)重疊僅發(fā)生在春季。這些研究的結(jié)果為了解沙漠m在變化的生境上的生態(tài)關(guān)系提供了信息。

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