Ecological and environmental effects of land use change in rapid urbanization: The case of hangzhou, China

2017 ◽  
Vol 81 ◽  
pp. 243-251 ◽  
Author(s):  
Xuejun Du ◽  
Zhonghua Huang
2014 ◽  
Vol 707 ◽  
pp. 228-231
Author(s):  
Zhi Bo Liu ◽  
Pei Ji Shi

With the rapid development of social and economy, land use/cover change (LUCC) has been regard as a critical effect of global environment change. Researches on LUCC convert from single factor influence to overall research on the effects of regional ecological environment. Research Scope of study area gradually changes from the ecological fragile areas in the western to developed areas. This paper summarized the main methods of effect of land use change on the evaluate of eco-environment research. The results show that: environmental effects of land use/cover change improved in the long term; the rapid progress of remote sensing technology and geographic information system make environmental effects of land use/cover change more convenient.


2020 ◽  
Vol 12 (9) ◽  
pp. 3895
Author(s):  
Xi Chen ◽  
Yanhua Wang ◽  
Zucong Cai ◽  
Changbin Wu ◽  
Chun Ye

Different land uses have varying degrees of impact on nitrogen transport in the catchments. In recent decades, rapid urbanization has dramatically changed the Earth’s land surface, which may cause excessive nitrogen losses and a negative influence on the environment. In the long-term scale, it is important to explore how the nitrogen transport responds to land use change and its effects on aquatic habitats. In this study, the water and sediment samples were collected from northern Taihu Basin, and nine periods of land use data were obtained using the techniques of supervised classification. Results revealed that the proportion of farmland area decreased from 28.33% to 7.09%, while that of constructed land area increased from 23.85% to 61.72% during 1990–2017. Most of the constructed land originated from farmland, which makes it the dominant land use type due to rapid urbanization. In spatial distribution, high total nitrogen (TN) losses regions remain distributed over constructed land and farmland, which may aggravate the trend of local water quality deterioration. Of these regions, constructed land was the dominant contributor (46.29%–63.62%) of TN losses from surface runoff. In temporal variation, the TN losses of runoff decreased by 47% from 175 t N·a−1 in 1990. However, they increased by 2.91% from 75.28 t N·a−1 after 2013 with rapid population growth and high fertilizer application (>570 kg·ha−1). The nitrogen load in sediments also has a significant response (t = 2.43, p = 0.02) to the effects of land use change on the overlying water, indicating that the role of nitrogen in the sediment as a source and/or sink to the waterbody may change frequently. Given the increasing accumulation of nitrogen loads in highly urbanized regions, water quality would cause more aggravation in the long-term without reasonable land management measures.


Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 306
Author(s):  
Vinicio Carrión-Paladines ◽  
Andreas Fries ◽  
Andrés Muñoz ◽  
Eddy Castillo ◽  
Roberto García-Ruiz ◽  
...  

This study evaluated the effects of land-use change (L-UCH) on dung beetle community structure (Scarabaeinae) in a disturbed dry ecosystem in southern Ecuador. Five different L-UCH classes were analyzed by capturing the dung beetle species at each site using 120 pitfall traps in total. To determine dung beetle abundance and diversity at each L-UCH, a general linear model (GLM) and a redundancy analysis (RDA) were applied, which correlated environmental and edaphic conditions to the community structure. Furthermore, changes in dung-producing vertebrate fauna were examined, which varied significantly between the different L-UCH classes due to the specific anthropogenic use or level of ecosystem disturbance. The results indicated that soil organic matter, pH, potassium, and phosphorus (RDA: component 1), as well as temperature and altitude (RDA: component 2) significantly affect the abundance of beetles (GLM: p value < 0.001), besides the food availability (dung). The highest abundance and diversity (Simpson’s index > 0.4, Shannon-Wiener index > 1.10) was found in highly disturbed sites, where soils were generally more compacted, but with a greater food supply due to the introduced farm animals. At highly disturbed sites, the species Canthon balteatus, Dichotomius problematicus, and Onthphagus confuses were found specifically, which makes them useful as bio-indicators for disturbed dry forest ecosystems in southern Ecuador.


Author(s):  
Elle M. Barnes ◽  
Steve Kutos ◽  
Nina Naghshineh ◽  
Marissa Mesko ◽  
Qing You ◽  
...  

CATENA ◽  
2019 ◽  
Vol 177 ◽  
pp. 180-188 ◽  
Author(s):  
Fabiane Pereira Machado Dias ◽  
Rodrigo Hübner ◽  
Flávia de Jesus Nunes ◽  
Wilson Mozena Leandro ◽  
Francisco Alisson da Silva Xavier

2004 ◽  
Vol 23 (2) ◽  
pp. 117-132 ◽  
Author(s):  
K. W. Oleson ◽  
G. B. Bonan ◽  
S. Levis ◽  
M. Vertenstein

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