Connectivity and landscape management

23 important questions on Connectivity and landscape management

What different kinds of connectivty do you have?

- Total: Corridor or natural forest connects tewo parks
- Partial: Trees are left for growing there
- Intensive: Narrow corridor between parks
- Extensive: Broad landscape of conservation-friendly human land use connecting multiple protected areas

What are the positive effects of connectivity?

- It can improve gene flow between protected areas
- Helps accomodate species range shifts
- Promotes gene flow as species go through poluation bottlenecks

Why are connections over very large distances unlikely?

- Most landscapes are dominated or affected by human land use
  • If climate change is severe enough to require long-distance connecitivty it will also affect a large number of species
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What are the negative effects of connectivity?

- Large amount of edge habitat to core habitat
- Land uses that involve disturbances
- Diseases can spread more easily

What is the problem with area demanding species?

- they require extensive home ranges for hunting or reproductive territory

Why is connectivity for large species so important?

- It can maintain entire ecoystems during climate change
- When the keystone species are lost, food chain reverberations may affect ecosystem structure and process

What are boom and bust cycles?

- High numbers when there is good food availability
- low numbers when food availability is low
  • Top predators are needed to modulate herbivore populations 

Which populations will be less vulnerable to climate change?

Populations regulated by predators

What does climate change to migratory species?

It alters the phenology causing them to arrive earlier and depart later in the poleward part of their range and to arrrive later and depart earlier in the more equatorial end of their migration

What do stepping stones allow?

- They allow feeding and rest for migrating individuals

What happens when timing of migration is affected?

- Also resources will be affected
  • Geese arriving early in artic summer, so grass is still dormant 

What is plant connectivity?

- On small scales
- Small scale connectivity will often occur on the periphery of existing protected areas to complement range already protected

What is the key principle for cost-effective connectivity?

To connect present and future populations and present and future attributes in a landscape that a species need to survive

What do large animals and predators need?

Connectivity between protected areas

What do small animals/birds need?

Connectivity between landscape elements that are shifting

What do habitat chains do?

Linking current suitable climate to future suitable climate
  • populations will be geographically distributed to minimize changes of extinction

Why is distributed connectivity important?

- It is a way of dealing with uncertainty about future cliimates
  • Changes do not proceed in one area, having connectivity in another area increases the change that multiple subpopulations will survive 

What is the planning process?

Target population size for each species
- Expert opinion and climate modeling is used

What helps to create cost-effective solutions?

- Choosing chains of suitable habitat that occur partly/entirely within existing protected areas
  • minimizing the need for new protection

What is a key activity in planning climate change connectivity?

Matching species needs with cost-effective options available in target landscapes

What is climate blowback?

The loss of habitat inflicted by climate changing human land uses may be of greater conservation impact than the direct effects of climate change on species

What does regional coordination ensure? And what is needed?

It ensures hormonization of resource management
Multiyear data is needed: Planting times
Annual data is needed: Determine when needed resources should be in place and ready

What do you need to do for fine scale connectivity of multiple species?

Reserves will need to coordinate management on a species by species basis

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