Assessing land use/cover changes: a nationwide multidate spatial database for Mexico

Mas, Jean-François; Velázquez, Alejandro; Díaz-Gallegos, José Reyes; Mayorga-Saucedo, Rafael; Alcántara, Camilo; Bocco, Gerardo; Castro, Rutilio; Fernández, Tania; Pérez-Vega, Azucena

doi:10.1016/j.jag.2004.06.002

Cited by 217 publications

(149 citation statements)

References 19 publications

Supporting

Mentioning

116

Contrasting

Unclassified

Order By: Relevance

“…They can have such impacts by affecting the composition of the atmosphere and the exchange of energy between continents and the atmosphere, which can lead to global warming [2]. Changes in LULC can also affect biological diversity, contribute to forest fragmentation, lead to soil erosion, alter ecosystem services, disrupt socio-cultural practices, and increase natural disasters, such as flooding [3,4]. This calls for global attention for continuous monitoring of the changes.…”

Section: Introductionmentioning

confidence: 99%

Land Use/Land Cover Change Analysis Using Object-Based Classification Approach in Munessa-Shashemene Landscape of the Ethiopian Highlands

et al. 2013

View full text Add to dashboard Cite

Abstract:The objective of this study was to analyze land use/land cover (LULC) changes in the landscape of Munessa-Shashemene area of the Ethiopian highlands over a period of 39 years . Satellite images of Landsat MSS (1973), TM (1986), ETM+ (2000, and RapidEye (2012) were used. All images were classified using object-based image classification technique. Accuracy assessments were conducted for each reference year. Change analysis was carried out using post classification comparison in GIS. Nine LULCs were successfully captured with overall accuracies ranging from 85.7% to 93.2% and Kappa statistic of 0.822 to 0.924. The classification result revealed that grasslands (42.3%), natural forests (21%), and woodlands (11.4%) were dominant LULC types in 1973. In 2012, croplands (48.5%) were the major LULC types followed by others. The change result shows that a rapid reduction in woodland cover of 81.8%, 52.3%, and 36.1% occurred between the first (1973-1986), second (1986-2000), and third (2000-2012) study periods, respectively. Similarly, natural forests cover decreased by 26.1% during the first, 21.1% during the second, and 24.4% during the third periods. Grasslands also declined by 11.9, 17.5, and 21.1% during the three periods, respectively. On the contrary, croplands increased in all three periods by 131, 31.5, and 22.7%, respectively. Analysis of the 39-year change matrix revealed that about 60% of the land showed changes in LULC. Changes were OPEN ACCESS Remote Sens. 2013, 5 2412 also common along the slope gradient and agro-ecological zones with varying proportions. Further study is suggested to investigate detailed drivers and consequences of changes.

show abstract

Section: Introductionmentioning

confidence: 99%

Land Use/Land Cover Change Analysis Using Object-Based Classification Approach in Munessa-Shashemene Landscape of the Ethiopian Highlands

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Sin embargo, el de USV muestra una transformación hacia pastizales inducidos y áreas de agricultura. Este tipo de vegetación tiene una tasa anual de alteración de 0.25% (Mas et al, 2004), con áreas muy perturbadas en la Sierra Madre Occidental, provincia en donde se distribuye esta especie. El mapa de influencia humana de Sanderson et al (2002) presenta valores que van de 26 a 65 (impacto alto), lo cual indica que las condiciones de los sitios donde se distribuye son limitantes a hostiles.…”

Section: Resultsunclassified

“…El mapa de USV muestra una transformación a pastizales inducidos, áreas de agricultura y zonas urbanas. En México, los bosques templados tienen una tasa de transformación anual de 0.25% y el tropical caducifolio de 0.76% (Mas et al, 2004). La influencia humana presenta valores de 18 a 70, por lo tanto, las áreas de distribución de la especie son limitantes a hostiles, con un impacto medio a alto.…”

Section: Resultsunclassified

Reevaluación del riesgo de extinción de cinco especies del género Polianthes l. (Agavaceae)

Feria-Arroyo¹,

Solano

García-Mendoza

2010

Acta Bot. Mex.

View full text Add to dashboard Cite

RESUMENCon base en el método de evaluación del riesgo de extinción de las especies silvestres en México (MER), se redefinió el de Polianthes densiflora, P. howardii, P. longiflora, P. palustris y P. platyphylla. Estas cinco plantas se encuentran listadas en la categoría de protección especial en la Norma Oficial Mexicana y fueron catalogadas como raras por la Unión Internacional para la Conservación de la Naturaleza (IUCN). El criterio A del MER (amplitud de la distribución geográfica) se estimó mediante tres métodos: área ocupada, extensión del área ocupada y mapas obtenidos a partir de modelos de distribución. Los criterios B (condición del hábitat natural) y D (impacto humano) fueron evaluados con base en el mapa de Influencia Humana de Sanderson et al., el cual asigna valores entre 0 y 100, en donde 0-10 indica áreas conservadas y 100 la total destrucción del hábitat. El criterio C (vulnerabilidad intrínseca), se asignó en función de la naturaleza geófila de las especies. Los resultados obtenidos sugieren que Polianthes densiflora y P. howardii están en peligro de extinción, P. longiflora y P. platyphylla se encuentran amenazadas y P. palustris está probablemente extinta. Ninguna de las cinco plantas se ha registrado en alguna Área Natural Protegida. Se proponen estrategias de conservación in situ y ex situ para las especies estudiadas, así como el desarrollo de programas de uso sustentable para P. longiflora y P. platyphylla, que podrían ser cultivadas y domesticadas mediante la propagación vegetativa.Palabras clave: Agavaceae, conservación, extinción, Polianthes. Acta Botanica Mexicana 92: 11-28 (2010) 12 ABSTRACTWe reassessed the extinction risk of the species Polianthes densiflora, P. howardii, P. longiflora, P. palustris and P. platyphylla by applying the MER (method of evaluation of extinction risk of wild species for Mexico). These species are listed as rare by the International Union for Conservation of Nature (IUCN) and are considered to be in the category of special protection according to Mexican regulation. MER criterion A (geographic distribution) was assessed with three methods: area of occupancy, extent of ocurrence, and species distribution models. Criteria B (habitat conditions) and D (impact of human activity) were examined by superimposing the human footprint map of Sanderson et al., where values range from 0 to 100. In this map, 0-10 denote pristine areas and 100 indicates that the habitat has been completely transformed. Criterion C (intrinsic biological vulnerability) was assigned based on the geophytic nature of the species. According to our findings, Polianthes densiflora and P. longiflora are in danger of extinction, while P. howardii and P. platyphylla are endangered and P. palustris is likely extinct. None of the five species concerned occur in any Natural Protected Area. We propose in situ and ex situ strategies to maintain these species as well as the development of programs of sustainable use for Polianthes longiflora and P. platyphylla. These species could be cultivated and...

show abstract

“…Guna tanah merujuk kepada kegiatan manusia ke atas tanah, sementara litupan bumi pula boleh merujuk kepada keadaan fizikal permukaan tanah (Meyer & Turner 1994). Penggunaan dan pengubahsuaian oleh manusia atau akibat kejadian alam ke atas LULC mengakibatkan penyahutanan, kehilangan biodiversiti, pemanasan global dan peningkatan bencana banjir (Dwivedi et al 2005;Mas et al 2004;Zhao et al 2004). Masalah alam sekitar sering dikaitkan dengan perubahan LULC.…”

Section: Pengenalanunclassified

Analisis Perubahan Guna Tanah dan Litupan Bumi di Gombak, Selangor Menggunakan Data Penderiaan Jauh

Choy¹

2016

JSM

View full text Add to dashboard Cite

The purpose of this study was to examine the land use and land cover changes (LULC) in Gombak, Selangor by using remote sensing approach. Comparison of time series data between years of 1989-1999, 1999-2014 and 1989-2014 LULC, accounted for -47.73% for the year 1989LULC, accounted for -47.73% for the year /1999LULC, accounted for -47.73% for the year , while 1999LULC, accounted for -47.73% for the year -2014 showed that the built-up area has the highest changes at +44.53% and for the year 1989-2014 rubber has the highest change value at -34.6%. The decline of rubber in Gombak can be attributed to the increasing of built-up area which has taken over the agricultural area. In general, the pattern of LULC in Gombak is in line with the expansion and implementation of development by the local authorities.

show abstract

Assessing land use/cover changes: a nationwide multidate spatial database for Mexico

Cited by 217 publications

References 19 publications

Land Use/Land Cover Change Analysis Using Object-Based Classification Approach in Munessa-Shashemene Landscape of the Ethiopian Highlands

Land Use/Land Cover Change Analysis Using Object-Based Classification Approach in Munessa-Shashemene Landscape of the Ethiopian Highlands

Reevaluación del riesgo de extinción de cinco especies del género Polianthes l. (Agavaceae)

Analisis Perubahan Guna Tanah dan Litupan Bumi di Gombak, Selangor Menggunakan Data Penderiaan Jauh

Contact Info

Product

Resources

About