Road-crossings, vegetative cover, land use and poisons interact to influence corridor effectiveness

This study applied GIS and remote sensing technology to assess agricultural land use and vegetative cover in Kano Metropolis. It specifically examined the intensity of land use for agricultural and non agricultural purpose from 1975 – 2015. Images (1975, 1995 and 2015), landsat MSS/TM, landsat 8, scene of path 188 and 052 were downloaded for the study. Bonds for these imported scenes were processed using ENVI 5.0 version. The result indicated five classified features-settlement, farmland, water body, vegetation and bare land. The finding revealed an increase in settlement, vegetation and bare land between 1995 and 2015, however, farmland decreased in 2015. Indicatively, higher percentage of land use for non agricultural purposes was observed in recent time. Conclusively, there is need to accord surveying the rightful place and priority in agricultural planning and development if Nigeria is to be self food sufficient. Keywords: Geographic Information System, Agriculture, Remote sensing, Land use, Land cover

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Spatial-temporal variation in land use in a coastal watershed under pressure of population growth

Engenharia Sanitaria e Ambiental ◽

10.1590/s1413-415220190080 ◽

2021 ◽

Author(s):

Dafne Duani Pereira da Silva ◽

Paulo Ricardo Schwingel

Keyword(s):

Land Use ◽

Population Growth ◽

River Basin ◽

Riparian Forest ◽

Population Data ◽

Vegetative Cover ◽

Rapid Urbanization ◽

Coastal Watershed ◽

Assessment Protocol ◽

Natural Dynamics

ABSTRACT Population progress is one of the main factors affecting the environment, modifying the natural dynamics of ecosystems. The Camboriú River Basin is located on the southern coast of Brazil and is strongly affected by population growth. This paper aimed to verify the space-time variation in the land use of the Camboriú River Basin by identifying changes in occupation and land use between 1986 and 2017. The rapid environmental assessment protocol was applied using the following parameters: bottom substrate, habitat complexity, backwaters quality, stability of banks, vegetative protection, vegetative cover, vegetative quality, and riparian vegetation presence. The changes in occupation and land use show rapid urbanization with a rise of 9% in 1986 to 24% in 2017. In riparian forest, higher altitude regions of the watershed show better results when compared to lower course regions, which are, thus, reflected in the environmental integrity of the stretches of stream studied. As for the behavior of urban occupation in space, it was verified that it did not occur continuously in comparison with the population, data during the studied period.

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Climate and land use influences on changing spatiotemporal patterns of mountain vegetation cover in southwest China

10.5194/egusphere-egu21-1665 ◽

2021 ◽

Author(s):

Shanshan Jiang ◽

Xi Chen ◽

Keith Smettem ◽

Tiejun Wang

Keyword(s):

Land Use ◽

Climate Warming ◽

Vegetation Index ◽

Southwest China ◽

High Elevation ◽

Spatiotemporal Patterns ◽

Land Uses ◽

Cultivated Land ◽

Vegetative Cover ◽

High Elevations

<p>Understanding the spatiotemporal patterns of vegetative cover in relation to climate and land uses is essential for effective management of ecology and the environment. In this study, spatial and temporal changes of the normalized difference vegetation index (NDVI) and potential influencing factors were analyzed in different elevations and land uses across southwest China. Results showed: (1) there was a critical elevation of 3400 m, with different NDVI responses to climate and human interventions above and below 3400 m. Below 3400 m, mean NDVI in each land use area and the whole region did not change with elevation due to compensative effects of decreasing cultivated land and increasing woodland and grassland towards high elevations. Above 3400 m, cultivation effectively ceases. NDVI decreased with elevation as alpine plant species shifted from woody trees to alpine grass, primarily related to declining temperature towards high altitudes. (2) NDVI responses to climate change and human activities are also different above and below 3400 m. NDVI below 3400 m increased significantly after 1980s, primarily as a result of reforestation on hillslopes and improved agricultural productivity. Above 3400 m, under climate warming since the 1980s, NDVI did not increase significantly in 1990s and even decreased in 2000s as the consecutive rise of temperature is higher towards higher altitudes in the 2000s. (3) The area-weighted NDVIs illustrated that from 1980s to 2000s, the increased mean NDVI in the whole region arose from contributions of 20.93, 60.66 and 18.41% changes in NDVIs in cultivated land, woodland and grassland, respectively. In 2000s, the proportion of the woody trees contribution to NDVI increased due to reforestation in the low elevation area (<3400 m), but decreased due to shift of the woody trees to alpine grass under the consecutive climate warming in the high elevation area (>3400 m). The decease of NDVI in the high elevations did not alter increasing trend of NDVI across the whole region during 1982-2015. However, in future, the greening could diminish or even cease as climate warming continues and effects of artificially managed ecological restoration reduce.</p>

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Land-use and vegetative cover as factors influencing runoff

Transactions American Geophysical Union ◽

10.1029/tr025i001p00040 ◽

1944 ◽

Vol 25 (1) ◽

pp. 40

Author(s):

Karl O. Kohler

Keyword(s):

Land Use ◽

Vegetative Cover ◽

Factors Influencing

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Weedy Signs of Intent and Error

10.12987/yale/9780300251746.003.0009 ◽

2021 ◽

pp. 166-192

Author(s):

Michael R. Dove

Keyword(s):

Land Use ◽

Imperata Cylindrica ◽

Vegetative Cover ◽

Government Officials ◽

Positive Role ◽

Native Land ◽

Fallow Period ◽

Open Land ◽

Insight Into ◽

Land Use Practices

This chapter highlights two plants that occur in pioneering successions on open land: Imperata cylindrica, a grass, and Chromolaena odorata, a shrub. Farmers regard the two plants as benign or malign depending upon how well they match desired fallow-period vegetative cover: if similar they are welcomed, if dissimilar they are not. Government officials, due to their commitment to plantation agriculture and a general aversion to the practice of leaving land fallow, hold a negative view of both plants, seeing them as “weeds.” Government authorities generally attribute the origins of the two plants to the accidental outcomes of bad native land-use practices, rejecting out of hand the idea that the plants might play a positive role in these practices. For their part, many farmers attribute the origins of Imperata and Chromolaena to intentional, self-interested dissemination by state actors; their view is in effect a political–cological one. Government actors take an apolitical view, going to great lengths to assert that there is no divergence in interests between the state and its citizens. Ultimately, the stories regarding the origins of these weedy plants, with the creative license of folktales, afford rural peoples a measure of perspective on and insight into wider environmental processes and transformations.

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Potential of current perennial plant-based farming systems to deliver salinity management outcomes and improve prospects for native biodiversity: a review

Australian Journal of Experimental Agriculture ◽

10.1071/ea04160 ◽

2005 ◽

Vol 45 (11) ◽

pp. 1357 ◽

Cited By ~ 24

Author(s):

E. C. Lefroy ◽

F. Flugge ◽

A. Avery ◽

I. Hume

Keyword(s):

Land Use ◽

Water Use ◽

Farming Systems ◽

Food Sources ◽

Vegetative Cover ◽

Catchment Scale ◽

Land Use Systems ◽

Perennial Plant ◽

South Eastern ◽

Flow Systems

Existing perennial plant-based farming systems are examined within 4 climatic zones in southern Australia (western winter rainfall, south-eastern low to medium rainfall, south-eastern high rainfall and northern summer rainfall) to assess their potential to improve the management of dryland salinity. If profit is to be the primary driver of adoption, it appears that the available options (lucerne and other perennial pastures, farm forestry, saltland pastures and forage shrubs) will fall short of existing hydrological targets with the exception of the higher rainfall zones. In the 3 eastern zones, the need to preserve fresh water flows to permanent river systems places limitations on the use of perennial plants, while the higher proportion of regional groundwater flow systems increases response times and heightens the need for regional coordination of effort. In the western zone, the prevalence of local and intermediate ground water flow systems increases effectiveness of individual action. Research into new perennial land use systems has been characterised by an emphasis on water use over profit resulting from poor dialogue between paddock, farm and catchment scales. Exploring the water use implications of land use systems that are potentially viable at farm scale is a more promising approach than focusing on the opportunity cost of catchment scale intervention. Perennial plant-based farming systems present both threats and opportunities to native biodiversity. The major threat is the introduction of new environmental weeds. The opportunities are potential improvements in vegetative cover, food sources and habitat for the native biota, but only where nature conservation goals can influence the structural complexity, composition and location of new land use systems.

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Land-Use/Land-Cover Change Analysis and Urban Growth Modelling in the Greater Accra Metropolitan Area (GAMA), Ghana

Urban Science ◽

10.3390/urbansci3010026 ◽

2019 ◽

Vol 3 (1) ◽

pp. 26 ◽

Cited By ~ 18

Author(s):

Bright Addae ◽

Natascha Oppelt

Keyword(s):

Land Use ◽

Land Cover ◽

Land Cover Change ◽

Urban Growth ◽

Urban Areas ◽

City Planning ◽

Land Use Land Cover ◽

Vegetative Cover ◽

Landsat Images ◽

Urban Extent

A rapid increase in the world’s population over the last century has triggered the transformation of the earth surface, especially in urban areas, where more than half of the global population live. Ghana is no exception and a high population growth rate, coupled with economic development over the last three decades, has transformed the Greater Accra region into a hotspot for massive urban growth. The urban extent of the region has expanded extensively, mainly at the expense of the vegetative cover in the region. Although urbanization presents several opportunities, the environmental and social problems cannot be underestimated. Therefore, the need to estimate the rate and extent of land use/land cover changes in the region and the main drivers of these changes is imperative. Geographic Information Systems (GIS) and remote sensing techniques provide effective tools in studying and monitoring land-use/land-cover change over space and time. A post classification change detection of multiple Landsat images was conducted to map and analyse the extent and rate of land use/land cover change in the region between 1991 and 2015. Subsequently, the urban extent of the region was forecasted for the year 2025 using the Markov Chain and the Multi-Layer Perceptron neural network, together with drivers representing proximity, biophysical, and socio-economic variables. The results from the research revealed that built-up areas increased by 277% over the 24-year study period. However, forest areas experienced massive reduction, diminishing from 34% in 1991 to 6.5% in 2015. The 2025 projected land use map revealed that the urban extent will massively increase to cover 70% of the study area, as compared to 44% in 2015. The urban extent is also anticipated to spill into the adjoining districts mainly on the western and eastern sides of the region. The success of this research in generating a future land-use map for 2025, together with the other significant findings, demonstrates the usefulness of spatial models as tools for sustainable city planning and environmental management, especially for urban planners in developing countries.

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Influences of long-term changes in land cover on mammal populations: an example from Mexico

Oryx ◽

10.1017/s0030605317000485 ◽

2017 ◽

Vol 53 (2) ◽

pp. 321-328

Author(s):

Consuelo Lorenzo ◽

Eugenia C. Sántiz ◽

Jorge Bolaños-Citalán ◽

Darío Navarrete-Gutiérrez

Keyword(s):

Land Use ◽

Prescribed Burning ◽

Captive Breeding ◽

Management Strategies ◽

Tropical Dry Forest ◽

Dry Forest ◽

Secondary Forests ◽

Sylvilagus Floridanus ◽

Vegetative Cover ◽

Mammal Species

AbstractChanges in vegetative cover and land use in the southern part of the Isthmus of Tehuantepec in Oaxaca, Mexico, were identified by analysing satellite images from 2001 and 2014. Fluctuations in population density of mammal species during 2001–2016 in response to these changes were analysed. During 2001–2014 the types of land use that increased in area (per year) were prescribed burning (uncontrolled burning caused by humans) by 105.11 ha, seasonal agricultural plots by 58.14 ha, areas without vegetation by 24.54 ha, and human settlements by 4.13 ha. In the same period, savannahs decreased by 103.94 ha, tropical dry forest by 39.5 ha, secondary forests by 14.46 ha, and human-induced grassland by 0.13 ha per year. The loss of these habitats resulted in low population densities of mammals, including the eastern cottontail Sylvilagus floridanus and the Tehuantepec jackrabbit Lepus flavigularis, which is categorized as Endangered on the IUCN Red List. We recommend establishing a communal ecological reserve in the study area to implement appropriate management strategies for grassland communities and develop a programme of semi-captive breeding to conserve L. flavigularis.

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