EXERCISE. Effect of fragmentation on orthopteran communities Two main pressures: 1. Habitat loss 2. Abandonment (within-patch forest encroachment)

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Presentation transcript:

EXERCISE

Effect of fragmentation on orthopteran communities Two main pressures: 1. Habitat loss 2. Abandonment (within-patch forest encroachment)

How to design a conservation study 2. Selection of the sites and environmental data 3. Insect sampling 4. Collect the data 5. Analyse the data and answer the questions 1. Define the questions 6. Derive implications for conservation

How to design a conservation study 1.Define the questions -...

Question: What do you want to conserve? Question: Which are the threats? -... Single species, communities...

Start writing a model to answer your research questions Y= aX 1 + bX 2... Y= response (biodiversity measure) X= explanatory variables collinearity is the evil!!!

2. Define the study area

2. Selection of the sites

3. Insect sampling Box quadrat Sweep netting Transect count

Community data Site 1Site 2Site 3… Species A100 Species B200 Species C700 Species D9710 Species E Species F700 Species G1500 Species H76747 …1142 Presence/absence or abundance How to measure diversity from this data? 4. Collect the data

Environmental data Site 1Site 2Site 3… Area Isolation Habitat diversity … 4. Collect the data Characterize the sites

f(Environmental data) 5. Analyse the data Community data=

f(Environmental data) 5. Analyse the data Community data=

What do we need to do to protect orthopteran diversity ? Implications for management 6. Derive implications for conservation