Ecological effects of land-use change on two sides of the Hu Huanyong Line in China

An estuarine wetland is an area of high ecological productivity and biodiversity, and it is also an anthropic activity hotspot area, which is of concern. The wetlands in estuarine areas have suffered declines, which have had remarkable ecological impacts. The land use changes, especially wetland loss, were studied based on Keyhole and Landsat images in the Liao River delta from 1962 to 2016. The dynamics of the ecosystem service values (ESVs), suitable habitat for birds, and soil heavy metal potential ecological risk were chosen to estimate the ecological effects with the benefit transfer method, synthetic overlaying method, and potential ecological risk index (RI) method, respectively. The driving factors of land use change and ecological effects were analyzed with redundancy analysis (RDA). The results showed that the built-up area increased from 95.98 km2 in 1962 to 591.49 km2 in 2016, and this large change was followed by changes in paddy fields (1351.30 to 1522.39 km2) and dry farmland (189.5 to 294.14 km2). The area of wetlands declined from 1823.16 km2 in 1962 to 1153.52 km2 in 2016, and this change was followed by a decrease in the water area (546.2 to 428.96 km2). The land use change was characterized by increasing built-up (516.25%), paddy fields (12.66%) and dry farmland (55.22%) areas and a decline in the wetland (36.73%) and water areas (21.47%) from 1962–2016. Wetlands decreased by 669.64 km2. The ESV values declined from 6.24 billion US$ to 4.46 billion US$ from 1962 to 2016, which means the ESVs were reduced by 19.26% due to wetlands being cultivated and the urbanization process. The area of suitable habitat for birds decreased by 1449.49 km2, or 61.42% of the total area available in 1962. Cd was the primary soil heavy metal pollutant based on its concentration, accumulation, and potential ecological risk contribution. The RDA showed that the driving factors of comprehensive ecological effects include wetland area, Cd and Cr concentration, river and oil well distributions. This study provides a comprehensive approach for estuarine wetland cultivation and scientific support for wetland conservation.

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Effects of Land-Use Change on the Community Structure of the Dung Beetle (Scarabaeinae) in an Altered Ecosystem in Southern Ecuador

Insects ◽

10.3390/insects12040306 ◽

2021 ◽

Vol 12 (4) ◽

pp. 306

Author(s):

Vinicio Carrión-Paladines ◽

Andreas Fries ◽

Andrés Muñoz ◽

Eddy Castillo ◽

Roberto García-Ruiz ◽

...

Keyword(s):

Land Use ◽

Community Structure ◽

Land Use Change ◽

Dung Beetle ◽

Dry Forest ◽

Farm Animals ◽

P Value ◽

Southern Ecuador ◽

Abundance And Diversity ◽

Effects Of Land Use

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.

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Assembly of the amphibian microbiome is influenced by the effects of land‐use change on environmental reservoirs

Environmental Microbiology ◽

10.1111/1462-2920.15653 ◽

2021 ◽

Author(s):

Elle M. Barnes ◽

Steve Kutos ◽

Nina Naghshineh ◽

Marissa Mesko ◽

Qing You ◽

...

Keyword(s):

Land Use ◽

Land Use Change ◽

Effects Of Land Use

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Effects of land-use change on chemical attributes of a Ferralsol in Brazilian Cerrado

CATENA ◽

10.1016/j.catena.2019.02.016 ◽

2019 ◽

Vol 177 ◽

pp. 180-188 ◽

Cited By ~ 1

Author(s):

Fabiane Pereira Machado Dias ◽

Rodrigo Hübner ◽

Flávia de Jesus Nunes ◽

Wilson Mozena Leandro ◽

Francisco Alisson da Silva Xavier

Keyword(s):

Land Use ◽

Land Use Change ◽

Brazilian Cerrado ◽

Chemical Attributes ◽

Effects Of Land Use

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Effects of land-use change on channel morphology in northeastern Puerto Rico

Geological Society of America Bulletin ◽

10.1130/0016-7606(2000)112<1763:eoluco>2.0.co;2 ◽

2000 ◽

Vol 112 (12) ◽

pp. 1763-1777 ◽

Cited By ~ 54

Author(s):

Jeffrey J. Clark ◽

Peter R. Wilcock

Keyword(s):

Land Use ◽

Puerto Rico ◽

Land Use Change ◽

Channel Morphology ◽

Effects Of Land Use

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Effects of land use change on North American climate: impact of surface datasets and model biogeophysics

Climate Dynamics ◽

10.1007/s00382-004-0426-9 ◽

2004 ◽

Vol 23 (2) ◽

pp. 117-132 ◽

Cited By ~ 75

Author(s):

K. W. Oleson ◽

G. B. Bonan ◽

S. Levis ◽

M. Vertenstein

Keyword(s):

Land Use ◽

Land Use Change ◽

North American ◽

Climate Impact ◽

North American Climate ◽

Effects Of Land Use

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Land Use Change Effects on Soil Quality in Prince Edward County, ON

Inquiry@Queen's Undergraduate Research Conference Proceedings ◽

10.24908/iqurcp.9648 ◽

2018 ◽

Author(s):

Kelsey Watts

Keyword(s):

Land Use ◽

Organic Matter ◽

Land Use Change ◽

Bulk Density ◽

Soil Quality ◽

Water Holding Capacity ◽

Total Carbon ◽

Prince Edward County ◽

Effects Of Land Use ◽

Water Holding

Soils play a critical role to society as a medium that facilitates crop production and also contributes to the energy and carbon balance of the Earth System. Land-use change and improper land-use is one of the dominant factors affecting soil erosion and nutrient loss in soils. We examined the effects of land-use change on an Elmbrook clay/clay-loam soil on a farm in Ameliasburg on the northern part of Prince Edward County. Three cover types were examined: a sod field (established for over 10 years), a wheat field (part of a wheat/corn/soybean rotation for 30 years) and an undisturbed deciduous forest. Under each land-use type, cores to a depth of 40 cm were collected along three random 30 m transects (at 8, 16 and 24 m), then divided them into 10 cm increments, combining all similar depth increments along one transect. Soil quality was assessed by analyzing various soil physical and chemical properties. Bulk density of the soil was much higher (1.55 vs. 0.95 g/cm3) in both agricultural ecosystems compared to the forest, but only in the 0-10 cm layer. Soil moisture at 60% water holding capacity was much greater for the forest than the sod and wheat soils. Soil pH was slightly lower in the forest compared to the sod and wheat fields. The sod and wheat fields showed losses of ~52% and ~53% organic matter, respectively, in contrast to the forested area. The greatest differences in organic matter and total carbon were found in the top 10 cm, likely due to the greater accumulation of litter at the ground surface in the forest compared to the agricultural sites. It appears that long-term (10 year) agricultural production has led to a decline in some, but not all, soil quality measures, particularly soil organic matter, bulk density and water holding capacity. These findings are consistent with much of the literature concerning the effects of land-use change on soil quality, and highlight the need to develop improved management systems to minimize losses in soil quality that can lead to declines in the productivity potential of soils over time.

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