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A methodological framework for analysing: Landscape dynamics in relation to organic farming

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Gregor Levin, National Environmental Research Institute / Roskilde University A methodological framework for analysing: Landscape dynamics in relation to organic farming – PowerPoint PPT presentation

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Title: A methodological framework for analysing: Landscape dynamics in relation to organic farming


1
A methodological framework for
analysingLandscape dynamics in relation to
organic farming
Gregor Levin, National Environmental Research
Institute / Roskilde University
Archived at http//orgprints.org/00001362
2
My background
- PhD scholarship at NERI, Department of Policy
Analysis / Roskilde University, Institute of
Geography - Master in geography from University
of Copenhagen - Thesis Land use driven
conditions for habitat structure A case study
from the Ecuadorian Andes. - Fields of interest
Landscape analysis, landscape management and
-planning, land use systems, GIS
3
Project Background 1
- Title Landscape dynamics in relation to
organic farming
- to what extend and how has the growing
conversion to organic farming affected spatial
pattern and content of natural and semi natural
habitats in the Danish agricultural landscape?
- Part of an interdisciplinary research project
on Nature quality in organic farming
- Overall research question Under which
conditions is it possible to favour high
biological diversity in a high yielding organic
production system that supports esthetical and
recreational opportunities
- Participators from Biology, agronomy,
sociology, geography
4
Project Background 2
- 1950ies - mid 80ies Substantial loss of
natural and semi natural landscape elements in
Danish landscapes due to agricultural
intensification
- Since mid 70ies growing concern on
agricultures environmental effects
- Since 1987 State regulations and subsidies for
organic farming
- 1990ies Substantial growth in organic farming
- 2002 Organic farming constitutes over 6.5 of
all agricultural land in Denmark
5
Project Background 3
- Principles of Organic Farming include
protection of habitats in the surrounding of the
production system
- It is generally expected that organic farming,
due to its holistic ecosystem approach, benefits
richness and diversity of natural and semi
natural habitats
- For organic farming there exist no specific
rules concerning management of these habitats
- Documentation of such relation is insufficient
and is not able to explain underlying forces and
processes
6
Landscape dynamics in relation to organic
farming- to what extend, how and why?
- 3 key questions
To what extent?
Quantitative analysis of spatio temporal
landscape dynamics
Quantitative analysis of relations between
landscape dynamics biophysical and socio economic
parameters
How?
Qualitative analysis of underlying forces and
processes
Why?
7
To what extent?
- Mapping of seminatural and natural habitats
based on aerial photos from 1954 - 2002
- Whole, continuous landscapes (beyond farm level)
- 4 case areas representing typical Danish
landscapes
- Each case area app. 25 square kilometres
- Min. 12 organic and 12 conventional farms
within each case area
8
Interpretation of aerial photos
9
How?
- Registration and analysis of driving forces for
spatio-temporal dynamics in natural and semi
natural habitats
- Both biophysical and socio-economical
parameters at different spatial and temporal
scales
- Sources - Questionnaires with organic and
conventional farms - Agricultural statistics at
farm and parish level - Spatial data sets on
soil and geomorphology
10
Parameters influencing land use decision taking
and landscape management
biophysical soil hydrology topography
socio-economic income age values
land use strategy
market forces
legislation, subsidies
11
Different driving forces can be active at
different spatial and temporal scales
Scale hierarchy
But The single farmers decision on allocation
and management of landscape elements is taken at
field or sub field level. E.g.
hedges ponds ditches
permanent grass fallow
12
In a GIS with attached databases, spatio
temporal dynamics of natural and semi natural
habitats are analysed in relation to different
driving forces.
Parameters (E.g.) household or farm
specific land use pattern land cover
pattern soil and geomorphology
13
In a GIS with attached databases, spatio
temporal dynamics of natural and semi natural
habitats are analysed in relation to different
driving forces.
Parameters (E.g.) household or farm
specific land use pattern land cover
pattern soil and geomorphology
14
In a GIS with attached databases, spatio
temporal dynamics of natural and semi natural
habitats are analysed in relation to different
driving forces.
Parameters (E.g.) household or farm
specific land use pattern land cover
pattern soil and geomorphology
15
In a GIS with attached databases, spatio
temporal dynamics of natural and semi natural
habitats are analysed in relation to different
driving forces.
Parameters (E.g.) household or farm
specific land use pattern land cover
pattern soil and geomorphology
16
In a GIS with attached databases, spatio
temporal dynamics of natural and semi natural
habitats are analysed in relation to different
driving forces.
Parameters (E.g.) household or farm
specific land use pattern land cover
pattern soil and geomorphology
17
Possible Results
- Relationship between landscape diversity and
org. farming
- Relationship between landscape diversity and
farmers age
- Relationship between landscape diversity and
small farm sizes
- Relationship between landscape diversity and
small org, farms with young farmers
18
But
- Such (quantitative) analysis can point to
significant statistical tendencies, but is not
able to explain underlying processes
- Therefore In order to understand how different
parameters affect land use strategies and thus
dynamics of natural and semi natural habitats, I
need to combine quantitative measures with
qualitative methods.
- ...not every thing which can be counted,
counts, but there are many things that cannot be
counted, which count. (Naveh 2002)
19
Therefore
- Based on the results from the quantitative
analysis, app 8 organic and conventional farmers
will be selected for in depth interviews
- Through these interviews, statistical relations
from the quantitative analysis are investigated
and discussed
- Interviews can not be representative, but
together with the quantitative analysis give a
better understanding and maybe clarification of
statistical relationships
20
A methodological framework
21
A methodological framework for
analysingLandscape dynamics in relation to
organic farming
Gregor Levin, National Environmental Research
Institute / Roskilde University
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