Land Use, Riparian Vegetation, and Salmon: Historical Changes Along the Alsea and Yaquina Rivers of Oregon 1952–1994

2003 ◽  
Vol 65 (1) ◽  
pp. 60-76
Author(s):  
Mark M. Van Steeter
Keyword(s):  
Land Use ◽  
Riparian Vegetation ◽  
Historical Changes

scholarly journals Historical Changes in Land Use and Suitability for Future Agriculture Expansion in Western Bahia, Brazil

2021 ◽  
Vol 13 (6) ◽  
pp. 1088
Author(s):  
Fernando Martins Pimenta ◽  
Allan Turini Speroto ◽  
Marcos Heil Costa ◽  
Emily Ane Dionizio
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Suitability ◽  
Agricultural Area ◽  
Landsat Images ◽  
Historical Changes ◽  
Cropland Area ◽  
Irrigated Area ◽  
Agriculture Expansion ◽  
Forest Code

Western Bahia is a critical region in Brazil’s recent expansion of agricultural output. Its outstanding increase in production is associated with strong growth in cropland area and irrigation. Here we present analyses of Western Bahian historical changes in land use, including irrigated area, and suitability for future agricultural expansion that respects permanent protection areas and the limits established by the Brazilian Forest Code in the Cerrado biome. For this purpose, we developed a land use and land cover classification database using a random forest classifier and Landsat images. A spatial multicriteria decision analysis to evaluate land suitability was performed by combining this database with precipitation and slope data. We demonstrate that between 1990 and 2020, the region’s total agricultural area increased by 3.17 Mha and the irrigated area increased by 193,480 ha. Throughout the region, the transition between the different classes of land use and land cover followed different pathways and was strongly influenced by land suitability and also appears to be influenced by Brazil’s new Forest Code of 2012. We conclude that even if conservation restrictions are considered, agricultural area could nearly double in the region, with expansion possible mostly in areas we classify as moderately suitable for agriculture, which are subject to climate hazards when used for rainfed crops but are otherwise fine for pastures and irrigated croplands.

Effects of local land-use on riparian vegetation, water quality, and the functional organization of macroinvertebrate assemblages

2017 ◽  
Vol 609 ◽  
pp. 724-734 ◽  
Author(s):  
Pablo Fierro ◽  
Carlos Bertrán ◽  
Jaime Tapia ◽  
Enrique Hauenstein ◽  
Fernando Peña-Cortés ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Riparian Vegetation ◽  
Functional Organization ◽  
Macroinvertebrate Assemblages ◽  
Vegetation Water

scholarly journals Historical changes in land use influence current habitat preferences of large herbivores

2019 ◽  
Vol 34 (10) ◽  
pp. 2251-2259 ◽  
Author(s):  
Kajetan Perzanowski ◽  
Maciej Januszczak ◽  
Rafał Łopucki
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Habitat Preferences ◽  
Field Research ◽  
Study Data ◽  
European Bison ◽  
Large Herbivore ◽  
Large Herbivores ◽  
Historical Changes ◽  
Effective Factor

Abstract Context Predicting habitat use patterns is a key issue in the management of large herbivore populations. Particularly, indicators providing a model of the spatial distribution of a population in a simple way, without the necessity of laborious field research, are still being sought. Analysis of historical landscape changes can be one of such predictive tools. Objectives We tested the hypothesis that historical changes in land use can be used as an effective factor enabling prediction of spatial distribution. As a case study, data on habitat preferences of European bison Bison bonasus (wisents) were used. Methods Spatial distribution of 17302 records of the presence of wisents, collected over the period of 10 years, was compared using contemporary and historical habitat maps for the Bieszczady Mts. (Poland). The area of approx. 87 thousand ha was selected, where the density of human population decreased over four times, and the percentage of forests increased from over 30% to almost 80% due to land abandonment. Results Wisents were recorded significantly more frequently in parts of the forest that in the past were used for agriculture. We found that identification of parts of the forest overgrowing former cultivated fields makes it possible to predict the spatial distribution of wisent herds with very high probability. Conclusions Information on historical changes in land use can be used as a simple and effective factor enabling prediction of habitat selection by wisents. Such an approach can potentially be useful for similar assessments of other large wild herbivores.

The influence of riparian vegetation on water quality in a mixed land use river basin

2019 ◽  
Vol 35 (3) ◽  
pp. 259-267 ◽  
Author(s):  
Evan M. Chua ◽  
Scott P. Wilson ◽  
Sue Vink ◽  
Nicole Flint
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Riparian Vegetation ◽  
Mixed Land Use

scholarly journals Factores psicosociales que influyen en la intención de los tomadores de decisión agropecuarios de la Pampa austral de Argentina de conservar las franjas de vegetación ribereñas

2021 ◽  
Author(s):  
Gustavo Giaccio ◽  
Matías Mastrangelo ◽  
Virginia Aparicio ◽  
José Luis Costa ◽  
Pedro Laterra
Keyword(s):  
Land Use ◽  
Social Factors ◽  
Riparian Vegetation ◽  
Agricultural Intensification ◽  
Decision Makers ◽  
Cognitive Factors ◽  
Emotional Factors ◽  
Model Based ◽  
Normative Factors

En áreas de intensificación agropecuaria, los tomadores de decisión son los responsables del uso de las tierras y de la conservación de las franjas de vegetación ribereñas. Estas, proporcionan numerosos servicios ecosistémicos a los seres humanos. A pesar de su importancia, cuando la calidad de los suelos lo permite, son convertidas en áreas de cultivo. El objetivo de este trabajo fue comprender la influencia relativa de distintos factores psicosociales, sobre las intenciones de conservar los ambientes ribereños. Se eligieron 50 explotaciones en la Pampa Austral de Argentina, se entrevistaron a los tomadores de decisión a los que se pidió completaran una encuesta de tipo estructurada. Las respuestas fueron codificadas, analizadas estadísticamente y se obtuvieron 3 modelos de ecuaciones estructurales. El modelo basado en los factores normativos mostró el mayor peso, el segundo mejor modelo, fue el cimentado en factores cognitivos, en tanto que, el fundado en factores emocionales fue el de menor representatividad. Se concluye que si bien los factores normativos fueron los que mejor explicaron las intenciones de conservación, representan cuellos de botella en los que no se puede influir y solo se puede intervenir a través de los factores cognitivos, promoviendo el conocimiento. In areas of agricultural intensification, decision makers are responsible for the land use and the conservation of riparian vegetation strips. These provide many ecosystem services to humans. Despite their importance, they are converted into crop areas when the quality of the soils allows it. The objective of this work was to understand the relative influence of different psycho-social factors on the intentions to conserve the riparian environments. Fifty decision makers of farms of the Southern Pampa of Argentina were interviewed in order to complete a structured survey. The responses were coded and statistically analyzed to determine three models ofstructural equationswere obtained. A model based on normative factors showed the greatest weight. A second model, based on cognitive factors, was most adjusted than one based on emotional factors. It is concluded that although normative factors were the ones that best explained the intentions about the conservation. These factors represent bottlenecks that cannot be influenced and can only be intervened by cognitive factors based on the promotion of the knowledge.

A micro case study of the legal and administrative arrangements for river health in the Kangaroo River (NSW)

2002 ◽  
Vol 45 (11) ◽  
pp. 161-168 ◽  
Author(s):  
C. Mooney ◽  
D. Farrier
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Land Use ◽  
Drinking Water ◽  
Riparian Vegetation ◽  
Diffuse Pollution ◽  
Management Systems ◽  
River Health ◽  
New Development

Kangaroo Valley is a drinking water supply catchment for Kangaroo Valley village, parts of the Southern Highlands and Sydney. It is also a popular recreation area both for swimming and canoeing. Land use has traditionally been dominated by dairy farming but there has been significant and continuing development of land for hobby farms and rural residential subdivision. Dairy industry restructuring has affected the viability of some farms in the Valley and created additional pressure for subdivision. River health is a function of flows, water quality, riparian vegetation, geomorphology and aquatic habitat and riverine biota. River flows in the Kangaroo River are affected by water extraction and storage for urban water supply and extraction by commercial irrigators and riparian land holders which have a significant impact at low flows. Current water quality often does not meet ANZECC Guidelines for primary contact and recreation and the river is a poor source of raw drinking water. Key sources of contaminants are wastewater runoff from agriculture, and poorly performing on-site sewage management systems. Riparian vegetation, which is critical to the maintenance of in-stream ecosystems suffers from uncontrolled stock access and weed infestation. The management of land use and resulting diffuse pollution sources is critical to the long term health of the river. The Healthy Rivers Commission of New South Wales Independent Inquiry into the Shoalhaven River System Final Report July, 1999 found that the longer term protection of the health of the Kangaroo River is contingent upon achievement of patterns of land use that have regard to land capability and also to the capability of the river to withstand the impacts of inappropriate or poorly managed land uses. This micro case study of Kangaroo Valley examines the complex legal and administrative arrangements with particular reference to the management of diffuse pollution for river health. In the past, diffuse pollution has fallen through the gaps in legislation and its administration. Although water pollution legislation is broad enough to embrace diffuse pollution, in practice the Environment Protection Authority has focused on regulating point sources. Water legislation has traditionally been concerned with issues of water quantity rather than water quality. Legislation which allows agency intervention in relation to land degradation has grown from soil conservation roots, neglecting the flow-on effects upon water quality. Under the land use planning system existing land uses are protected from new regulatory requirements. A number of recent developments in NSW law and its administration have set the scene for addressing this past neglect. Water planning provisions in the Water Management Act 2000 have the potential to enable community based Water Management Committees to move away from a narrow focus on water quantity to the broader issues of river health, including water quality. Improved management of on-site sewage management systems is expected as a result of the Local Government (Approvals) Amendment (Sewage Management Regulation) 1998. A draft Regional Environmental Plan prepared for the Sydney Catchment Authority aims to improve the assessment of new development in terms of its impact on drinking water quality. It also moves away from an exclusive concern with controlling new development towards grappling with existing uses. Proposed amendments to the Environmental Planning and Assessment Act, 1979 as detailed in the White Paper, Plan First (2001) include the integration of imperatives derived from catchment strategies and water management plans into local land use plans.

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