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Kelp Community Paths 21Jun07

Path Analysis
This presentation contains paths using functional groups described in following slide

The rest of the slides contained in the presentation outline the following paths

Kelp forest community using complete dataset for PISCO where samples are repeated through time for sites

2) Same as above with strongest indirect path highlighted

3) Kelp forest community after temporal autocorrelation among sites was removed by subtracting abundance data from previous year for PISCO sites

4) Same as a above with strongest indirect path highlighted



Functional Groups
AUTOTROPHS
Fleshy algae/ Understory kelp (Eisenia arborea, Laminaria setchellii, Pterygophora californica)
Giant kelp (Macrocystis pyrifera)


INVERTEBRATES
Herbivorous invertebrates
Algae grazers: Strongylocentrotus franciscanus, Strongylocentrotus purpuratus (potentially incorporating lag time t-1)
Other herbivores: (Haliotis rufescens, Lithopoma gibberosum, Megathura crenulata,)
Omnivorous/scavenger invertebrates (Asterina miniata, Parastichopus parvimensis)
Sessile planktivorous invertebrates (Crassedoma giganteum, Tethya aurantia, Urticina lofotensis, Urticina piscivora, Astrangiala jollaensis, Balanophyllia elegans, Corynactis californica, Diopatra/Chaetopterus ornata/spp., Phragmatopoma californica, Stylaster californicus)
Predator invertebrates (Kelletia kelletii, Pisaster giganteus, Pisaster ochraceous, Pycnopodia helianthoides)


FISHES
Planktivorous fish (Chromis punctipinnis, Sebastes mystinus, Semicossyphus pulcher)
Mobile small-invertebrate-eating fish (Damalichthys vacca, Embiotoca jacksoni, Embiotoca lateralis, Oxyjulisc alifornica)
Invertebrate-eating fish/piscivores (Sebastes atrovirens, Sebastes serranoides, Sebastes flavidus, Semicossyphus pulcher)
Fishbase piscivorous fish* (Sebastes carnatus, Sebastes melanops, Sebastes chrysomelas, Sebastes rastrelliger, Sebastes caurinus)

Sebastes species not included: Sebastes miniatus, Sebastes paucispinis, Sebastes serriceps








* From Fish Base



.06
-.01
-.16
.24
.23
.43
.03
.30
.15
.33
.16
.16
.06
.13
-.13
-.25
.28
.04
Temporal autocorrelation removed
.10
.22
.94



.06
-.01
-.16
.24
.23
.43
.03
.30
.15
.33
.16
.16
.06
.13
-.13
-.25
.28
.04
Strongest indirect effect: predatory inverts  pisc fish = 0.10
Temporal autocorrelation removed
.22
.10
.94



-.03
-.21
.09
-.41
-.34
.20
-.02
.26
.54
.20
-.20
.43
.06
.18
-.09
.37
-.05
.02
Temporal autocorrelation NOT removed
.37
.16
-.19



-.03
-.21
.09
-.41
-.34
.20
-.02
.26
.54
.20
-.20
.43
.06
.18
-.09
.37
-.05
.02
Temporal autocorrelation NOT removed
.37
.16
Strongest indirect effect: kelp  fish_invert_pisc = 0.13
-.19

 

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by Irit Altman last modified 26-06-2007 07:54
 

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