本文選題：生態(tài)規(guī)劃 + 景觀連接度　； 參考：《生態(tài)學(xué)雜志》2017年03期

【摘要】：生境破碎化是城市生物多樣性保護(hù)和生態(tài)系統(tǒng)完整性面臨的主要威脅。構(gòu)建生態(tài)網(wǎng)絡(luò),提高生境斑塊間的連接水平,可以有效緩解城市生態(tài)環(huán)境問題。在當(dāng)前三峽庫區(qū)快速城鎮(zhèn)化、棲息地破碎與部分生境消失不可避免的背景下,本文以庫區(qū)開州新城為例,從有利于鄉(xiāng)土樹種擴(kuò)散定居過程為切入點(diǎn),以GIS技術(shù)為支撐,應(yīng)用最小費(fèi)用模型模擬潛在路徑,構(gòu)建城市生態(tài)網(wǎng)絡(luò);并結(jié)合圖論功能連接度指數(shù)驗(yàn)證網(wǎng)絡(luò)連接的最優(yōu)閾值,評價并劃分斑塊/連接的重要等級,從而確定新城棲息地/廊道保護(hù)、恢復(fù)的優(yōu)先順序。本研究篩選得到75個生境源斑塊;鄉(xiāng)土樹楓楊種子傳播的最遠(yuǎn)距離300 m是網(wǎng)絡(luò)模擬、評價的適宜閾值。在該距離條件下,識別出98條路徑連接,其中重要性高的路徑主要分布在澎溪河-漢豐湖沿岸,包括規(guī)劃院附屬綠地與湖濱公園連接,跨江高速大橋兩側(cè)的湖濱綠地連接;若這兩條連接被移除,網(wǎng)絡(luò)整體連接度將下降19.1%。此外,研究發(fā)現(xiàn),網(wǎng)絡(luò)路徑連接的重要性與其兩端的斑塊重要性不存在顯著相關(guān),但與斑塊所處的空間位置及其自身形狀特征有關(guān)。針對網(wǎng)絡(luò)現(xiàn)狀與模擬空白區(qū)存在的問題,本文提出了相應(yīng)的網(wǎng)絡(luò)優(yōu)化對策。研究結(jié)果可為三峽庫區(qū)城市/鎮(zhèn)開展生態(tài)網(wǎng)絡(luò)規(guī)劃提供參考依據(jù)。
[Abstract]:Habitat fragmentation is a major threat to urban biodiversity conservation and ecosystem integrity. Constructing ecological network and improving the connection level between habitat patches can effectively alleviate the urban ecological environment problems. Under the background of rapid urbanization, habitat fragmentation and the disappearance of some habitats in the three Gorges Reservoir area, this paper takes Kaizhou New Town in the reservoir area as an example, starting from the process of facilitating the spread and settlement of native tree species, and taking GIS technology as the support. The minimum cost model is used to simulate the potential path to construct the urban ecological network, and the optimal threshold of the network connection is verified by the graph theory functional connectivity index, and the important grade of patch / connection is evaluated and divided. Thus determine the new city habitat / corridor protection, restoration priorities. In this study, 75 habitat source patches were obtained, and the maximum distance of seed propagation of local maple poplar was 300m, which was the suitable threshold for network simulation and evaluation. Under this distance, 98 paths are identified, among which the most important ones are located along the banks of Penghuxihe-Hanfeng Lake, including the connection between the affiliated greenbelt and the lakeside park, and the greenbelt connection on the two sides of the cross-river highway bridge. If these two connections are removed, the overall connectivity of the network will be reduced by 19.1g. In addition, it is found that the importance of network path connection is not significantly related to the importance of patch at both ends of the patch, but to the spatial location of the patch and its own shape characteristics. Aiming at the current situation of the network and the problems existing in the simulated blank area, this paper puts forward the corresponding network optimization countermeasures. The results can be used as a reference for the planning of ecological network in the three Gorges Reservoir area.
【作者單位】： 西南大學(xué)地理科學(xué)學(xué)院;中國科學(xué)院重慶綠色智能技術(shù)研究院;
【基金】：國家自然科學(xué)基金項目(51408584和41571497) 中科院西部之光博士項目(Y43A370N10) 重慶科委應(yīng)用開發(fā)項目(cstc2014yykf C20002,Y33A172N10)資助
【分類號】：X321;P208

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本文編號：2100297