Changes in Land Surface Conditions on the Iberian Peninsula (1989 to 2004) Detected by Means of Time Series Analysis from Hypertemporal Remote Sensing Data

Udelhoven, T.; Stellmes, Marion

doi:10.1109/multitemp.2007.4293054

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…The central plateau is comprised by croplands, broadleaved, evergreen and coniferous forests, scrubland and urban areas. This landscape has been modified by human intervention with an intensification of activities such as transport infrastructures, agriculture, livestock raising, urbanization, mining, forestry and forest fires, resulting in the depletion of vegetation cover and soil erosion (Udelhoven & Stellmes, ). On the other hand, in mountain areas natural vegetation cover has increased in recent times due to land abandonment by humans in the last decades (Garcia‐Ruiz & Lasanta‐Martinez, ).…”

Section: Methodsmentioning

confidence: 99%

Refuge as major habitat driver for wolf presence in human‐modified landscapes

Grilo

Lucas

Fernández-Gil

et al. 2018

Animal Conservation

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Despite severe population declines and an overall range contraction, some populations of large carnivores have managed to survive in human-modified landscapes. From a conservation perspective, it is important to identify the factors allowing for this coexistence, including the relevant habitat characteristics associated with the presence of large carnivores. We evaluated the role of several environmental factors describing habitat quality for wolves Canis lupus in the humanised Iberian Peninsula, which currently holds an important wolf population at European level. We used maximum entropy and generalized linear model approaches in a nestedscale design to identify the environmental factors that are related to wolf presence at three spatial scales and resolutions: (1) distribution range: wolf presence on a 10 9 10 km grid resolution, (2) wolf habitat use: wolf occurrence on a 2 9 2 km grid and (3) dens/rendezvous sites: breeding locations on a 1 9 1 km grid. Refuge availability, as defined by topography, seemed to be the key factor determining wolf presence at the multiple scales analysed. As a result, wolf populations may coexist with humans in modified landscapes when the topography is complex. We found that a significant amount of favourable habitat is not currently occupied, suggesting that the availability of suitable habitat is not the limiting factor for wolves in the Iberian Peninsula. Habitat suitability outside the current range indicates that other factors, such as direct persecution and other sources of anthropogenic mortality, may be hampering its expansion. We suggest that priorities for conservation should follow two general lines: (1) protect good quality habitat within the current range; and (2) allow dispersal to unoccupied areas of good quality habitat by reducing human-induced mortality rates. Finally, we still need to improve our understanding of how wolves coexist with humans in modified landscapes at fine spatiotemporal scales, including its relationship with infrastructures, land uses and direct human presence.

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Section: Methodsmentioning

confidence: 99%

Refuge as major habitat driver for wolf presence in human‐modified landscapes

Grilo

Lucas

Fernández-Gil

et al. 2018

Animal Conservation

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“…A detailed description of the data preprocessing is given by Koslowsky (1996) and Friedrich et al (2006. Despite the applied correction scheme a bias between corresponding NOAA-14 (until 2000) and NOAA-16 (after 2000) data representing areas without long-term trends was found and accounted for by correcting the data by means of an empirically derived equation (Udelhoven, 2007;Udelhoven and Stellmes, 2007). After this adjustment the comparison of the MEDOKADS archive and the SPOT Vegetation time series for the overlapping time period from 1999 to 2004 shows very good agreement of the derived NDVI trends (Fig.…”

Section: Methodsmentioning

confidence: 99%

Mediterranean desertification and land degradation

Hill

Stellmes

Udelhoven³

et al. 2008

Global and Planetary Change

245

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“…The increase in temperature and the drought suffered in the past few decades in these two mountain ranges could result in a decrease in vegetation activity. Additionally, in Montes de Murcia y Alicante, the abandonment of crop areas and urban growth has been blamed until now [79,107,114] and could explain, in part, these patterns.…”

Section: Discussionmentioning

confidence: 99%

Monitoring NDVI Inter-Annual Behavior in Mountain Areas of Mainland Spain (2001–2016)

2018

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Currently, there exists growing evidence that warming is amplified with elevation resulting in rapid changes in temperature, humidity and water in mountainous areas. The latter might result in considerable damage to forest and agricultural land cover, affecting all the ecosystem services and the socio-economic development that these mountain areas provide. The Mediterranean mountains, moreover, which host a high diversity of natural species, are more vulnerable to global change than other European ecosystems. The protected areas of the mountain ranges of peninsular Spain could help preserve natural resources and landscapes, as well as promote scientific research and the sustainable development of local populations. The temporal statistical trends (2001–2016) of the MODIS13Q1 Normalized Difference Vegetation Index (NDVI) interannual dynamics are analyzed to explore whether the NDVI trends are found uniformly within the mountain ranges of mainland Spain (altitude > 1000 m), as well as in the protected or non-protected mountain areas. Second, to determine if there exists a statistical association between finding an NDVI trend and the specific mountain ranges, protected or unprotected areas are studied. Third, a possible association between cover types in pure pixels using CORINE (Co-ordination of Information on the Environment) land cover cartography is studied and land cover changes between 2000 and 2006 and between 2006 and 2012 are calculated for each mountainous area. Higher areas are observed to have more positive NDVI trends than negative in mountain areas located in mainland Spain during the 2001–2016 period. The growing of vegetation, therefore, was greater than its decrease in the study area. Moreover, differences in the size of the area between growth and depletion of vegetation patterns along the different mountains are found. Notably, more negatives than expected are found, and fewer positives are found than anticipated in the mountains, such as the Cordillera Cantábrica (C.Cant.) or Montes de Murcia y Alicante (M.M.A). Quite the reverse happened in Pirineos (Pir.) and Montes de Cádiz y Málaga (M.C.M.), among others. The statistical association between the trends found and the land cover types is also observed. The differences observed can be explained since the mountain ranges in this study are defined by climate, land cover, human usage and, to a small degree, by land cover changes, but further detailed research is needed to get in-depth detailed conclusions. Conversely, it is found that, in protected mountain areas, a lower NDVI pixels trend than expected (>20%) occurs, whereas it is less than anticipated in unprotected mountain areas. This could be caused by management and the land cover type.

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Changes in Land Surface Conditions on the Iberian Peninsula (1989 to 2004) Detected by Means of Time Series Analysis from Hypertemporal Remote Sensing Data

Cited by 5 publications

References 11 publications

Refuge as major habitat driver for wolf presence in human‐modified landscapes

Refuge as major habitat driver for wolf presence in human‐modified landscapes

Mediterranean desertification and land degradation

Monitoring NDVI Inter-Annual Behavior in Mountain Areas of Mainland Spain (2001–2016)

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