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Space Is the Final Frontier in Ecology

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1 Space Is the Final Frontier in Ecology
History of ecology = largely nonspatial e.g., *competitors mixed perfectly with prey *homogeneous ecosystems with uniform distributions of resources Simple population models

2 Space Is the Final Frontier in Ecology
History of ecology = largely nonspatial e.g., *competitors mixed perfectly with prey *homogeneous ecosystems with uniform distributions of resources But ecology = fundamentally spatial ecology = interaction of organisms with their [spatial] environment

3

4 Vancouver Island marmot (Marmota vancouverensis)
~100 left Isolated from hoary and Olympic marmots

5 Vancouver Island marmot (Marmota vancouverensis)
Natural tree succession

6 Vancouver Island marmot (Marmota vancouverensis)
Logging – disjunct patches max. dispersal = 7 km - Forestry disturbance Climate Prey-Predator Dynamics

7 History of Landscape Ecology
“European School” roots back to those of ecology typing, classifying, naming landscape architecture, planning, designing “American School” young = early 1980’s focus on natural systems theory & models, some field experiments

8 Landscape Ecology as a Science?
Meta-analysis of papers in Landscape Ecology (Wiens 1992) – 1st 5 yrs of journal Most studies are large scale (landscapes are big) Most studies are descriptive or conceptual Experiments difficult to conduct, thus modeling Emphasis on vegetation pattern / land use pattern Humans = impt. part of systems

9 Landscape Ecology as a Science?
Hobbs (1997) – 2nd 5 years of Landscape Ecology Less descriptive studies More “methods” and modeling studies, no expts. More quantitative / statistical analysis (spatial stats)

10 Emergence of Landscape Ecology
? Equilibrium View Constant species composition Disturbance & succession = subordinate factors Ecosystems self-contained Internal dynamics shape trajectory No need to look outside boundaries to understand ecosystem dynamics Structure Function ? ? ?

11 Emergence of Landscape Ecology
Structure Function Dynamic View Disturbance & ecosystem response = key factors Disturbance counter equilibrium Ecosystems NOT self-contained Multiple scales of processes, outside & inside Essential to examine spatial & temporal context

12 Emergence of Landscape Ecology
Broad-scale Environmental Issues Landscape Ecology Concepts of Scale/Hiearchy Dynamic View Advances in Technology

13 What is Landscape Ecology?

14 Landscape ecology focuses on spatial heterogeneity and pattern.
1) detecting pattern 2) define origin of pattern 3) predicting change 4) relating pattern to processes & mgt

15 1 m2 Often, spatial extents much larger than in traditional ecology… But, emphasize spatial pattern at relevant scale 1 km2 10’s km2

16 Often, focus on role of humans in creating and influencing patterns…
But, humans only one (albeit dominant) agent

17 Importance of Landscape Ecology to Conservation & Management
Ecosystem context matters Ecosystem function depends on interplay of pattern & process Policy & legal mandate to adopt landscape perspective

18 Importance of Landscape Ecology to Conservation & Management
Ecosystem context matters Metapopulations

19 Importance of Landscape Ecology to Conservation & Management
Ecosystem function depends on interplay of pattern & process Habitat fragmentation & Modified Disturbance Regimes

20 Importance of Landscape Ecology to Conservation & Management
Policy & legal mandate to adopt landscape perspective


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