Southwest Iberian Mediterranean sclerophyllous and mixed forests

Last updated
Southwest Iberian Mediterranean sclerophyllous and mixed forests
Sauceda0092.jpg
Ecoregion PA1221.svg
Location of the ecoregion (in purple)
Ecology
Realm Palearctic
Biome Mediterranean forests, woodlands, and scrub
Borders
Geography
Area70,407 km2 (27,184 sq mi)
Countries
Regions of Portugal and autonomous communities of Spain
Conservation
Conservation status critical/endangered
Protected14,761 km² (21%) [1]

The Southwest Iberian Mediterranean sclerophyllous and mixed forests is a Mediterranean forests, woodlands, and scrub ecoregion in southwestern Europe. It occupies the southwestern Iberian Peninsula, encompassing coastal lowlands and mountains in portions of Portugal and Spain.

Contents

The ecoregion has a Mediterranean climate, moderated by the influence of the Atlantic Ocean. Summer temperatures tend to be cooler than other Mediterranean climate regions, and winter frosts are rare below 1500 metres. [2]

Geography

The ecoregion occupies the coastal lowlands and hills in Portugal and southwestern Spain, including the lower basins of the Tagus, Guadiana, and Guadalquivir rivers. The city of Lisbon is at the mouth of the Tagus, and the cities of Seville and Cordoba lie in the valley of the Guadalquivir. Other cities in the ecoregion include Cadiz on the Atlantic, and Málaga on the Alboran Sea.

The ecoregion is bounded on the east by the Iberian sclerophyllous and semi-deciduous forests, which occupies most of interior Spain and Portugal's interior southeast. In northern coastal Portugal, the ecoregion is bounded on the north by the more humid and temperate Cantabrian mixed forests. To the northeast is the Northwest Iberian montane forests ecoregion.

Flora

The ecoregion's plant communities include:

Fauna

The ecoregion is home to the endangered Iberian lynx (Lynx pardinus) and Spanish imperial eagle (Aquila adalberti). Both species live in and around Doñana National Park.

Cork oak silviculture

The people of southern Portugal and southwestern Spain have developed land-use systems centered on cork oak (Quercus suber).

Cork oaks produce a thick protective bark which is harvested for cork. Harvesting involves peeling the bark from mature trees, which can begin when the trees reach a trunk diameter of 70 cm, typically when they are 20‐25 years old. Cork is harvested by hand with hand axes, and care is taken to minimize injury to the tree so it can continue to grow and produce more cork. Cork can be harvested every nine years from a given tree, and cork oaks can continue to grow and produce harvestable bark for 150 to 200 years or more. Industrially-usable cork is produced only after the third harvest, on trees that are forty years or more in age. Portugal is the planet's leading producer of cork, which is used for wine stoppers, flooring, sound insulation, floats, and more.

In Portugal, cork forests predominate in steeper areas with poor soils unsuited to agriculture, including the mountains of Algarve region and the hills of Alentejo region. Most cork forests are on private land. In some forests the understory shrubs are cleared to reduce fire risk, while in others the understory is allowed to grow naturally. [9]

The traditional cork oak agro‐silvopastoral landscapes are known as montados in Portugal and dehesas in Spain. They have a lower tree density than oak forests (40 to 80 trees per hectare), and have an open canopy or widely spaced trees that resemble a savanna. The understory is kept clear of shrubs, and used for grazing animals or for growing crops, typically wheat, barley and oats.

From the 1920s to the 1960s, Portuguese governments promoted large-scale wheat production, and many montados in the lowlands were cleared for monoculture wheat fields and to accommodate tractors. Since the 1960s Portugal has urbanized, and European and Portuguese agricultural policies no longer favor small-scale wheat farming. As a result, some small montado farms have been abandoned, and others consolidated into larger commercial farming operations. [10]

In Spain, the black Iberian pig is bred in enclosures but allowed to roam in the dehesas, where they graze on acorns. The pigs are slaughtered for Jamón ibérico, and ham from acorn-fed pigs is considered the highest quality. The ecoregion's oak species (Quercus ilex, Q. lusitanica, Q. pyrenaica, and Q. suber) produce acorns at different times of the year, so dehesas with diverse oak flora can sustain more pigs. Trained pigs are also used to harvest sought-after black truffles from the roots of oak trees.

In recent decades, interest in sustainable silviculture practices as a response to climate change and biodiversity loss has grown. Herdade do Freixo do Meio farm in Foros de Vale Figueira village, near Montemor-o-Novo in Alentejo, is reviving a form of montado silviculture. On the 600-hectare farm walnut, cork oak, olive, citrus, and other fruit and nut trees support grape vines, and provide food and shade to old varieties of pigs, cows, chickens, and turkeys. [11]

Plantations

Extensive areas of Portugal have been planted with plantations of Maritime pine (Pinus pinaster) and introduced eucalyptus, mostly Eucalyptus globulus . Pine is used chiefly for timber and particle board, while eucalyptus is used to make paper. From the 1970s onwards eucalyptus plantations increased in extent, mostly replacing pine plantations. 20% of the area planted in eucalyptus is managed by timber companies, with the rest on plots, often small, managed by individual landowners. Mixed stands of eucalyptus and pines are also common, particularly in untended plantations. Eucalyptus globulus can naturalize and spread into areas with sufficient water. [12] In April 2017, the Portuguese government announced its intention to prohibit the expansion of eucalyptus plantations, which was opposed by the pulp industry and landowners. [13] In the aftermath of the deadly June 2017 Portugal wildfires which resulted in 66 deaths and 204 injuries, the government announced further restrictions, including a ban on growing eucalyptus in certain areas, fines on the unauthorized purchase of eucalyptus seedlings, and permission to plant or re-plant eucalyptus only in designated areas, with one half-hectare permitted for each hectare removed from areas deemed unsuitable. [14]

Protected areas

14,761 km2, or 21%, of the ecoregion is in protected areas. [15]

Protected areas include Arrábida Natural Park (176.53 km2), Ria Formosa Natural Park (179.01 km2), Serras de Aire e Candeeiros Natural Park (383.92 km2), Sintra-Cascais Natural Park (144.51 km2), and Sudoeste Alentejano e Costa Vicentina Natural Park (895.72 km2) in Portugal, and Los Alcornocales Natural Park and Doñana National Park in Spain.

Related Research Articles

<span class="mw-page-title-main">Sclerophyll</span> Type of plant

Sclerophyll is a type of vegetation that is adapted to long periods of dryness and heat. The plants feature hard leaves, short internodes and leaf orientation which is parallel or oblique to direct sunlight. The word comes from the Greek sklēros (hard) and phyllon (leaf). The term was coined by A.F.W. Schimper in 1898, originally as a synonym of xeromorph, but the two words were later differentiated.

<i>Quercus suber</i> Species of plant

Quercus suber, commonly called the cork oak, is a medium-sized, evergreen oak tree in the section Quercus sect. Cerris. It is the primary source of cork for wine bottle stoppers and other uses, such as cork flooring and as the cores of cricket balls. It is native to southwest Europe and northwest Africa. In the Mediterranean basin the tree is an ancient species with fossil remnants dating back to the Tertiary period.

<span class="mw-page-title-main">Mediterranean Basin</span> Region of lands around the Mediterranean Sea that have a Mediterranean climate

In biogeography, the Mediterranean Basin, also known as the Mediterranean Region or sometimes Mediterranea, is the region of lands around the Mediterranean Sea that have mostly a Mediterranean climate, with mild to cool, rainy winters and warm to hot, dry summers, which supports characteristic Mediterranean forests, woodlands, and scrub vegetation. It was a very important part of Mediterranean civilizations.

<span class="mw-page-title-main">Corsican montane broadleaf and mixed forests</span> Ecoregion on the island of Corsica

The Corsican montane broadleaf and mixed forests ecoregion, in the Mediterranean forests, woodlands, and scrub biome, are on the island of Corsica. The ecoregion includes the high-elevation areas of Corsica's mountainous interior.

<span class="mw-page-title-main">Eastern Mediterranean conifer–sclerophyllous–broadleaf forests</span> Ecoregion in the Eastern Mediterranean Basin

The Eastern Mediterranean conifer-sclerophyllous-forests, also known as the Eastern Mediterranean conifer-forests, is an ecoregion in the eastern Mediterranean Basin. It covers portions of Turkey, Syria, Iraq, Lebanon, Israel, Palestinian territories, Jordan, and Saudi Arabia.

<span class="mw-page-title-main">Mediterranean woodlands and forests</span> Ecoregion in Northern Africa

The Mediterranean woodlands and forests is an ecoregion in the coastal plains, hills, and mountains bordering the Mediterranean Sea and Atlantic Ocean in North Africa. It has a Mediterranean climate, and is in the Mediterranean forests, woodlands, and scrub biome.

<span class="mw-page-title-main">Mediterranean conifer and mixed forests</span>

Mediterranean conifer and mixed forests is an ecoregion, in the temperate coniferous forest biome, which occupies the high mountain ranges of North Africa. The term is also a botanically recognized plant association in the African and Mediterranean literature.

<span class="mw-page-title-main">Black Iberian pig</span> Breed of pig

The Iberian pig is a traditional breed of the domestic pig that is native to the Iberian Peninsula. The Iberian pig, whose origins can probably be traced back to the Neolithic, when animal domestication started, is currently found in herds clustered in Spain and the central and southern part of Portugal.

<i>Dehesa</i> Multifunctional agro-sylvo-pastoral system

A dehesa is a multifunctional, agrosylvopastoral system and cultural landscape of southern and central Spain and southern Portugal; in Portugal, it is known as a montado. Its name comes from the Latin defensa (fenced), referring to land that was fenced and usually destined for pasture. Dehesas may be private or communal property. Used primarily for grazing, they produce a variety of products, including non-timber forest products such as wild game, mushrooms, honey, cork, and firewood. They are also used to raise the Spanish fighting bull and the source of jamón ibérico, the Iberian pig. The main tree component is oaks, usually holm and cork. Other oaks, including melojo and quejigo, may be used to form dehesa, the species utilized depending on geographical location and elevation. Dehesa is an anthropogenic system that provides not only a variety of foods, but also wildlife habitat for endangered species such as the Spanish imperial eagle.

<span class="mw-page-title-main">Illyrian deciduous forests</span> Terrestrial ecoregion of Europe

The Illyrian deciduous forests is a terrestrial ecoregion in southern Europe, which extends along the eastern coast of the Adriatic Sea. It belongs to the Mediterranean forests, woodlands, and scrub biome, and is in the Palearctic realm.

<span class="mw-page-title-main">Italian sclerophyllous and semi-deciduous forests</span> Ecoregion in Italy

The Italian sclerophyllous and deciduous forests ecoregion, part of the Mediterranean forests, woodlands, and scrub biome, is in Italy. The ecoregion covers most of the Italian Peninsula and includes both evergreen and deciduous forests.

<span class="mw-page-title-main">Tyrrhenian–Adriatic sclerophyllous and mixed forests</span> Ecoregion in Southern Europe

The Tyrrhenian-Adriatic sclerophyllous and mixed forests is an ecoregion in southern Italy, Sicily, Sardinia, Corsica, the Dalmatian Islands of Croatia, and Malta.

<i>Quercus rotundifolia</i> Species of flowering plant in the family Fagaceae

Quercus rotundifolia, the holm oak or ballota oak, is an evergreen oak native to the western Mediterranean region, with the majority on the Iberian Peninsula and minor populations in Northwest Africa. The species was first described by Jean-Baptiste Lamarck in 1785. It is the typical species of the Iberian dehesa or montado, where its sweet-astringent acorns are a source of food for livestock, particularly the Iberian pig. Its acorns have been used for human nourishment since the Neolithic era. It is placed in section Ilex. Some authors described it as a subspecies of Quercus ilex.

<span class="mw-page-title-main">Mediterranean forests, woodlands, and scrub</span> Habitat defined by the World Wide Fund for Nature

Mediterranean scrub is a biome defined by the World Wide Fund for Nature. The biome is generally characterized by dry summers and rainy winters, although in some areas rainfall may be uniform. Summers are typically hot in low-lying inland locations but can be cool near colder seas. Winters are typically mild to cool in low-lying locations but can be cold in inland and higher locations. All these ecoregions are highly distinctive, collectively harboring 10% of the Earth's plant species.

<span class="mw-page-title-main">Aegean and Western Turkey sclerophyllous and mixed forests</span> Ecoregion in Greece, Turkey, and North Macedonia

The Aegean and Western Turkey sclerophyllous and mixed forests is an ecoregion in the lands around the Aegean Sea. The ecoregion covers most of mainland Greece, the Greek Aegean Islands, the western coast of Turkey, the southern Vardar river valley in North Macedonia, the southern Struma river valley at the extreme south-western corner of Bulgaria.

<span class="mw-page-title-main">Cantabrian mixed forests</span>

The Cantabrian mixed forests is a temperate broadleaf and mixed forests ecoregion in southwestern Europe. It extends along the coastal Cantabrian Mountains and Galician Massif of Northern Spain, extending south into northern Portugal, and northwards through the westernmost Pyrenees to southwestern France. The ecoregion extends from the seacoast to the highest peaks of the Cantabrian Mountains. The highest peak is Torre Cerredo at 2,648 meters elevation.

<span class="mw-page-title-main">Iberian sclerophyllous and semi-deciduous forests</span>

The Iberian sclerophyllous and semi-deciduous forests is a Mediterranean forests, woodlands, and scrub ecoregion in southwestern Europe. It occupies the interior valleys and plateaus of the Iberian Peninsula. The ecoregion lies mostly in Spain, and includes some portions of eastern Portugal.

<span class="mw-page-title-main">Northeastern Spain and Southern France Mediterranean forests</span> Ecoregion in Southern Europe

The Northeastern Spain and Southern France Mediterranean forests is a Mediterranean forests, woodlands, and scrub ecoregion in southwestern Europe. It occupies the Mediterranean coastal region of northeastern Spain, Southern France, the Balearic Islands and a small part of Italy.

<span class="mw-page-title-main">Northwest Iberian montane forests</span>

The Northwest Iberian montane forests is a Mediterranean forests, woodlands, and scrub ecoregion in southwestern Europe. It lies in the northwestern Iberian Peninsula, includes inland mountains, foothills, and plateaus in northwestern Spain and northeastern Portugal.

<span class="mw-page-title-main">Iberian conifer forests</span>

The Iberian conifer forests is a Mediterranean forests, woodlands, and scrub ecoregion in southwestern Europe. It includes the mountain forests of southern and central Spain.

References

  1. Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b.
  2. "Southwest Iberian Mediterranean sclerophyllous and mixed forests". Terrestrial Ecoregions. World Wildlife Fund.
  3. "Southwest Iberian Mediterranean sclerophyllous and mixed forests". Terrestrial Ecoregions. World Wildlife Fund.
  4. Acácio, Vanda (2009). The dynamics of cork oak systems in Portugal: the role of ecological and land use factors. Thesis, Wageningen University, Wageningen, NL (2009) 210 pages.
  5. "Southwest Iberian Mediterranean sclerophyllous and mixed forests". Terrestrial Ecoregions. World Wildlife Fund.
  6. Filippi, Olivier (2019). Bringing the Mediterranean into Your Garden. Filbert Press, 2019.
  7. Acácio, Vanda (2009). The dynamics of cork oak systems in Portugal: the role of ecological and land use factors. Thesis, Wageningen University, Wageningen, NL (2009) 210 pages.
  8. "Southwest Iberian Mediterranean sclerophyllous and mixed forests". Terrestrial Ecoregions. World Wildlife Fund.
  9. Acácio, Vanda (2009). The dynamics of cork oak systems in Portugal: the role of ecological and land use factors. Thesis, Wageningen University, Wageningen, NL (2009) 210 pages.
  10. Acácio, Vanda (2009). The dynamics of cork oak systems in Portugal: the role of ecological and land use factors. Thesis, Wageningen University, Wageningen, NL (2009) 210 pages.
  11. Vidal, John (2019). "Putting pigs in the shade: the radical farming system banking on trees". The Guardian. 13 July 2019. Accessed 17 May 2020.
  12. Silva, Joaquim S. (2016) "Tasmanian blue gum (Eucalyptus globulus) in Portugal". Presentation to the In-Tree Conference, 2 Nov 2016, Ascona, Switzerland. Accessed 10 May 2020.
  13. "Ban on further eucalyptus forests enrages Portugal's pulp industry". Algarve Daily News, 24 April 2017. Accessed 10 May 2020.
  14. "Fines up to €44,000 for planting eucalyptus without prior permission". The Portugal News". 26 October 2018. Accessed 10 May 2020.
  15. Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b.