Chapter 9 Population Distribution and Abundance Northern Gannet.

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Presentation transcript:

Chapter 9 Population Distribution and Abundance Northern Gannet

Late Spring – Mid-Summer

Late Summer – Early Spring

Across the Atlantic …

POPULATION Population: All the individuals of a Given Species in a Defined Area

Distribution Distribution: Size, Shape and Location of the area it occupies

ABUNDANCE Abundance: Total Number of Individuals of Northern Gannet in a Defined Area.

DENSITY Density: Number of Individuals per Unit Area 50 m 60 Birds in Box

Distribution: Large Scale Sugar Maple (Acer saccharum)

Distribution: Large Scale Sugar Maple (Acer saccharum)

26 Saguaro Cactus (Carneggia gigantea) POPULATION

Distribution: Large Scale Saguaro Cactus (Carneggia gigantea)

27 Forrest Shreve ( ) Distribution: Large Scale Saguaro Cactus (Carneggia gigantea)

Distribution: Large Scale Saguaro Cactus (Carneggia gigantea)

Distribution: Large Scale Saguaro Cactus (Carneggia gigantea) ?? ?

DISTRIBUTION: Large Scale Fig. 9.3 in Molles 2008 TIGER BEETLE (Cicindela longilabris) 32

Fig. 9.4 in Molles 2006 DISTRIBUTION: Large Scale

NORTH AMERICA VEGETATION TYPES

Distribution: Medium Scale Elevation Gradients (Zonation) Gila River Valley

23 Arizona Sycamore Pinon Pine Ponderosa Pine 26 White Fir (Trees of the Gila National Forest) Distribution: Elevation Gradients

Distribution: Small Scale Intertidal Gradients (Zonation) NICHE: Environmental Limits of a Species

Fundamental Niche (Red) FUNDAMENTAL NICHE: Physical Conditions under which a Species Might Live IN ABSENCE OF COMPETITION FROM OTHER SPECIES

Fundamental Niche (Green) REALIZED NICHE: Physical Conditions under which a Species Might Live LIMITED BY BIOTIC INTERACTIONS WITH OTHER SPECIES

~ 20,000 Years Ago DISTRIBUTION: Large Scale Temporal Variation Sugar Maple Eastern Hemlock

DISTRIBUTION: Large Scale Temporal Variation Sugar Maple Eastern Hemlock

DISTRIBUTION: Large Scale Temporal Variation European Starling (Sturnus vulgaris) 39

DISTRIBUTION: Large Scale Temporal Variation 34 EUROPEAN STARLING (Sturnus vulgaris)

Creosote (Larrea tridentata) Regular (= Uniform) Pattern 1 2 PATTERN

10 Regular (= Uniform) Pattern PATTERN

Parry’s Agave (Agave parryi) 4 6 PATTERN Clumped (= Aggregated) Pattern

Cliff Swallow Willdebeast DISTRIBUTION: Small Scale Clumped (= Aggregated) Pattern

Cottonwood Mistletoe (Phoradendron macrophyllum) DISTRIBUTION: Small Scale Clumped (= Aggregated) Pattern

Sagebrush (Artemisia tridentata) DISTRIBUTION: Small Scale Random Pattern

9 DISTRIBUTION: Small Scale Random Pattern

Fig in Molles 2006 DISTRIBUTION: Small Scale Pattern: Random, Regular, Clumped

Uniform Temporal Variation in Pattern Clumped Random Creosote (Larrea tridentata)

Fig in Molles 2006 Temporal Variation in Pattern Creosote (Larrea tridentata)

15 PATTERN: Small Scale Mechanism for Regular Pattern

Fig in Molles 2006 Mechanism for Regular Pattern

78 Pattern at Multiple Spatial Scales

18 21 Christmas Bird Count (Winter) Patterns at Large Spatial Scales

Fig in Molles 2007 American CrowFish Crow Patterns at Large Spatial Scales Christmas Bird Count (Winter) 19

17 18 Breeding Bird Survey (Summer) Patterns at Large Spatial Scales

Summer Distributions Red-Eyed Vireo (Vireo olivaceus) Fig in Molles 2006 Patterns at Large Spatial Scales

x305.jpg Summer2005_Slides/su05%20247%20creosote.jpg herdpressure.jpg

10 to%20sort%20061.jpg 11 NestCommune.jpg _Slides/su05%20247%20creosote.jpg

17 %20KCR.jpg % JPG mts-o.jpg 23

gif angiosperms/dicotyledonae/aceraceae/sugar%20maple/JSC% %20Sugar%20Maple.JPG

32 _longilabris-1.JPG Ricklefs, R.E. and G. Miller Ecology, 4 th edition. W.H. Freeman and Co Arne%20Ader.JPG 38 / 39

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