Landscape Dynamics, Ecosystems, and Desertification in Spain
Fundamental Concepts of Environmental Geography
Ecosystem Definition
An Ecosystem is the whole interrelationship of all the creatures that inhabit a particular area (the biotic elements) and the environment they inhabit (the abiotic components).
Formula: Ecosystem = Biotic Elements + Abiotic Components.
Biodiversity
Biodiversity is the variety of life forms (creatures) that exist on Earth or within a specific region.
Understanding Landscape
A Landscape is the set consisting of an area's ecosystem combined with economic, social, and cultural factors characteristic of a particular human society (the anthropogenic elements). These elements determine the human influence on the site.
Formula: Landscape = Ecosystem + Anthropogenic (Man-made) Elements.
Main Elements of Landscape Change
The primary factors driving changes in a landscape are:
- Agricultural Work: This includes replacing forests with crops or pasture, draining wetlands, and building terraces.
- Urbanization Process: This results in the formation of large urban concentrations and the construction of extensive road networks.
- The Industrial Sector: This involves the exploitation of raw materials and the construction of major infrastructure, such as large dams, gas pipelines, power lines, and industrial facilities (e.g., industrial estates, technology parks).
Types of Human-Influenced Landscapes
- Forest and Agricultural Landscape: A landscape where crops, forests, and villages alternate.
- Urban and Suburban Landscape: A landscape characterized by elements related to housing and urban lifestyles, including cities, towns, roads, and housing developments.
Recent Landscape Transformations in Catalonia
In Catalonia, several significant landscape changes have been observed in recent years:
- Forest Expansion: An increase in forest extent, primarily due to the regression (reduction) of agricultural land.
- Dispersion of Urban Elements: The spread of urban features, such as new industrial areas and the construction of second homes.
- Transport Infrastructure Growth: A constant increase in transport-related elements, including highways, roads, and railways.
- Tertiary Sector Growth: An increase in elements related to the tertiary sector (services), such as large commercial areas and parking facilities.
- Advertising Presence: The steady increase in the presence of advertising elements.
Consequences of Landscape Transformation: Desertification
One of the main consequences of this landscape transformation is increased exposure to erosion and degradation, which leads to desertification.
It is noted that Spain currently holds the highest rate of desertification within the European Union.
Mitigating Desertification
The primary solution to combat desertification is the recovery of plant cover.