Limits...
Regional-scale land-cover change during the 20th century and its consequences for biodiversity.

Cousins SA, Auffret AG, Lindgren J, Tränk L - Ambio (2015)

Bottom Line: Extensive changes in land cover during the 20th century are known to have had detrimental effects on biodiversity in rural landscapes, but the magnitude of change and their ecological effects are not well known on regional scales.Semi-natural grassland cover decreased by over 96 % in the study area, being largely lost to afforestation and silviculture.An analysis of the landscape-level biodiversity revealed that plant species richness was generally more related to the modern landscape, with grazing management being a positive influence on species richness.

View Article: PubMed Central - PubMed

Affiliation: Biogeography and Geomatics, Department of Physical Geography, Stockholm University, 106 91, Stockholm, Sweden, sara.cousins@natgeo.su.se.

ABSTRACT
Extensive changes in land cover during the 20th century are known to have had detrimental effects on biodiversity in rural landscapes, but the magnitude of change and their ecological effects are not well known on regional scales. We digitized historical maps from the beginning of the 20th century over a 1652 km(2) study area in southeastern Sweden, comparing it to modern-day land cover with a focus on valuable habitat types. Semi-natural grassland cover decreased by over 96 % in the study area, being largely lost to afforestation and silviculture. Grasslands on finer soils were more likely to be converted into modern grassland or arable fields. However, in addition to remaining semi-natural grassland, today's valuable deciduous forest and wetland habitats were mostly grazed grassland in 1900. An analysis of the landscape-level biodiversity revealed that plant species richness was generally more related to the modern landscape, with grazing management being a positive influence on species richness.

No MeSH data available.


Major landscape transitions between 1900 and 2013 in a 1652 km2 transect in southeastern Sweden. Boxes are proportional to the change where the italic number gives the percentage of total land cover in the study area. Arrows show the dominant transitions to another land cover. Modern grassland derives from different historical land-cover categories but were primarily semi-natural grassland that have been used as arable fields between 1900 and today, or semi-natural grasslands that have been improved with fertilizers. Open water and dwellings are not included in the figure
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Fig3: Major landscape transitions between 1900 and 2013 in a 1652 km2 transect in southeastern Sweden. Boxes are proportional to the change where the italic number gives the percentage of total land cover in the study area. Arrows show the dominant transitions to another land cover. Modern grassland derives from different historical land-cover categories but were primarily semi-natural grassland that have been used as arable fields between 1900 and today, or semi-natural grasslands that have been improved with fertilizers. Open water and dwellings are not included in the figure

Mentions: The area of semi-natural grassland shrank dramatically to less than 4% of its previous cover, because of increasing silviculture (Fig. 3). Arable field also declined, either becoming forest or modern grassland. Modern grassland, which did not exist in 1900, covers more than three times the present-day semi-natural grassland area.Fig. 3


Regional-scale land-cover change during the 20th century and its consequences for biodiversity.

Cousins SA, Auffret AG, Lindgren J, Tränk L - Ambio (2015)

Major landscape transitions between 1900 and 2013 in a 1652 km2 transect in southeastern Sweden. Boxes are proportional to the change where the italic number gives the percentage of total land cover in the study area. Arrows show the dominant transitions to another land cover. Modern grassland derives from different historical land-cover categories but were primarily semi-natural grassland that have been used as arable fields between 1900 and today, or semi-natural grasslands that have been improved with fertilizers. Open water and dwellings are not included in the figure
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4288995&req=5

Fig3: Major landscape transitions between 1900 and 2013 in a 1652 km2 transect in southeastern Sweden. Boxes are proportional to the change where the italic number gives the percentage of total land cover in the study area. Arrows show the dominant transitions to another land cover. Modern grassland derives from different historical land-cover categories but were primarily semi-natural grassland that have been used as arable fields between 1900 and today, or semi-natural grasslands that have been improved with fertilizers. Open water and dwellings are not included in the figure
Mentions: The area of semi-natural grassland shrank dramatically to less than 4% of its previous cover, because of increasing silviculture (Fig. 3). Arable field also declined, either becoming forest or modern grassland. Modern grassland, which did not exist in 1900, covers more than three times the present-day semi-natural grassland area.Fig. 3

Bottom Line: Extensive changes in land cover during the 20th century are known to have had detrimental effects on biodiversity in rural landscapes, but the magnitude of change and their ecological effects are not well known on regional scales.Semi-natural grassland cover decreased by over 96 % in the study area, being largely lost to afforestation and silviculture.An analysis of the landscape-level biodiversity revealed that plant species richness was generally more related to the modern landscape, with grazing management being a positive influence on species richness.

View Article: PubMed Central - PubMed

Affiliation: Biogeography and Geomatics, Department of Physical Geography, Stockholm University, 106 91, Stockholm, Sweden, sara.cousins@natgeo.su.se.

ABSTRACT
Extensive changes in land cover during the 20th century are known to have had detrimental effects on biodiversity in rural landscapes, but the magnitude of change and their ecological effects are not well known on regional scales. We digitized historical maps from the beginning of the 20th century over a 1652 km(2) study area in southeastern Sweden, comparing it to modern-day land cover with a focus on valuable habitat types. Semi-natural grassland cover decreased by over 96 % in the study area, being largely lost to afforestation and silviculture. Grasslands on finer soils were more likely to be converted into modern grassland or arable fields. However, in addition to remaining semi-natural grassland, today's valuable deciduous forest and wetland habitats were mostly grazed grassland in 1900. An analysis of the landscape-level biodiversity revealed that plant species richness was generally more related to the modern landscape, with grazing management being a positive influence on species richness.

No MeSH data available.