Musculoskeletal Disorder: Fibromyalgia By: Jessica Proffitt.
Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays)...
Transcript of Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays)...
![Page 1: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/1.jpg)
Oyster Reefs as Critical Habitat: Assessing Short-and-Long-Term Effects of the Deepwater
Horizon Spill and other Stressors
E. Proffitt1, L. Coen2, S. Geiger3, D. Kimbro4, H. Nance5 and J. Weinstein6
1 Florida Atlantic University 2 Florida Gulf Coast University 3 Florida Fish and Wildlife Conservation Commission 4 Florida State University 5 Harbor Branch Oceanographic Institution at Fl. Atlantic Univ. 6 The Citadel Photo: L. Coen
![Page 2: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/2.jpg)
Steve Geiger
John Weinstein
David Kimbro
Holly Nance
Loren Coen
Team Oyster
![Page 3: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/3.jpg)
Oysters are both ecological engineers and foundation species
Support >200 associated species (some fishery species)
![Page 4: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/4.jpg)
Crassostrea virginica : 3,626 km2 of oyster habitat
(Butler 1954)
![Page 5: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/5.jpg)
69 % of US Oyster landings are from the Gulf of Mexico (Turner 2006 Estuaries & Coasts)
• 4,019 oil & gas platforms • 25,000 miles of active pipelines (on the seafloor!) • 50% of the US oil & gas production
In the Gulf of Mexico …
gulfofmexicoalliance.org/pdfs/gulf_glance_1008.pdf
![Page 6: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/6.jpg)
Oyster Reefs in Trouble ! % Loss Worldwide (data from Beck et al. 2011 BioScience)
Percent of Habitat Type0 20 40 60 80 100
Oyster Reef
Mangrove & Salt Marsh (30-50)
Seagrass
Coral Reef
![Page 7: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/7.jpg)
Impairment of Oyster Populations Worldwide
From Beck et al. (2011), and http://www.aibs.org/bioscience-press-releases/resources/Beck.pdf
Fair = 50 – 89% Loss Poor= >=90 % Loss
![Page 8: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/8.jpg)
G F P E St. Lucie
Lake Worth Lagoon
Loxahatchee River
Biscayne Bay
Rookery Bay
Naples & Dollar Bays
Estero Bay
Charlotte Harbor
Caloosahatchee River
Tampa Bay
Cedar Key
Apalachicola Bay
Pensacola Bay
Mobile Bay
Mississippi Sound
From Website associated with the BioScience 2011 publication: G=good, F=Fair (ie, 50-89% loss!), P= Poor, E= Functionally Extinct
http://www.oyster-restoration.org/reports/Shellfish%20Reefs%20at%20Risk-single%20pages.pdf?PHPSESSID=651fa993ea180fac27fe78e83a2a674f
![Page 9: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/9.jpg)
The Gulf of Mexico Cumulative Effects of the DWH Spill + other Stressors & Disturbances
2010 Dead Zone
Gulf of Mexico Oysters Adult (sub)Populations=
Larvae at Sea
![Page 10: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/10.jpg)
The Gulf of Mexico Cumulative Effects of the DWH Spill + other Stressors & Disturbances
2010 Dead Zone
Impacts to BOTH Adult & Larval Life Stages Have Important Implications to Populations
Larvae Suffer Unknown Reductions from Oil & Freshwater
Very High Adult
Mortalities ? ?
![Page 11: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/11.jpg)
2010 Dead Zone
DWH
River Diversions
Cuba’s Planned
Oil Well(s)
Invasive species: Green Mussel
SOME IMPACTS CUMULATIVE EFFECTS
![Page 12: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/12.jpg)
Our Approach Oyster Popul.
Abundance (live, dead, size freq.)
Recruitment (oysters & associated
species)
Genetic Diversity & Connectivity
among sub-populations
(throughout Gulf)
Oyster Growth in Size
PAH analysis of tissues
![Page 13: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/13.jpg)
Field Ecology & PAH Sampling
Big Bend
Tampa Bay
Pine Isl. Snd. - CH
Rookery Bay
![Page 14: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/14.jpg)
Work to Date Population Genetics
Holly Nance
![Page 15: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/15.jpg)
Genetic analyses
• Currently have over 700 oysters from 17 sites from South FL to TX
• Sample sizes are roughly 40-50 oysters per site • Have genotyped over 400 oysters to date,
from 9 of 17 sites, at 10 microsatellite loci • Currently optimizing 3-4 more msat loci, for a
total of 13-14 loci
![Page 16: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/16.jpg)
Objectives • Characterize habitat, recruitment, growth, and survival in C.
virginica along the Gulf coast of Florida • Characterize genetic structure, diversity, connectivity, and
demographic history before and after DWH
![Page 17: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/17.jpg)
Background of C. virginica genetics
• Previous work in GOM has found significant structure at both mtDNA and nDNA (Hoover and Gaffney 2005; Galindo-Sanchez 2008; Varney et al 2009)
• Fine-scale and temporal sampling have not been done • Demographic history and processes behind patterns of
structure are unknown
6 additional sites along MX coast
![Page 18: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/18.jpg)
Questions
• Is there genetic differentiation within and/or between estuaries?
• Are these patterns temporally stable? • What processes are causing these patterns? • Has DWH affected connectivity, diversity, and
Ne?
![Page 19: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/19.jpg)
Preliminary Data • Based on 7 msat loci
(Brown et al 2000; Reece et al 2004), genotyped across 763 individuals from 17 reefs
• Most loci are not in HWE in every sample
• Excess of homozygotes at most loci in most populations suggests null alleles or inbreeding are prevalent
Rookery Bay, FL
![Page 20: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/20.jpg)
Spatial Structure • Overall FST = 0.013, p = 0.000 • FCT = 0.008, p = 0.001; FSC = 0.002, p = 0.002 • Weak but significant differentiation between
and within regions
![Page 21: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/21.jpg)
STRUCTURE • Population assignment method that groups
individuals such that HW and Linkage Equilibrium are maximized (Hubisz et al 2009)
• Preliminary analyses suggest there are 2 genetic clusters across the Gulf of Mexico
![Page 22: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/22.jpg)
Pairwise genetic differences
RBD CCT TAB SCB TB1 TB3 SMA ALH PP SBW BS GT GBD CL HMR CWS LPRRBD *CCT 0.01 *TAB 0.00 0.01 *SCB 0.00 0.01 0.01 *TB1 0.00 0.00 0.00 0.00 *TB3 0.00 0.01 0.01 0.00 0.00 *SMA 0.00 0.01 0.01 0.01 0.00 0.00 *ALH 0.01 0.01 0.01 0.01 0.00 0.01 0.00 *PP 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.02 *SBW 0.02 0.03 0.03 0.02 0.01 0.02 0.01 0.01 0.01 *BS 0.01 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 -0.01 *GT 0.03 0.05 0.04 0.02 0.03 0.02 0.03 0.04 0.01 0.02 0.02 *GBD 0.02 0.03 0.03 0.03 0.02 0.02 0.01 0.03 0.00 0.01 0.00 0.01 *CL 0.02 0.04 0.03 0.02 0.02 0.02 0.02 0.03 0.01 0.01 0.01 0.00 0.01 *HMR 0.02 0.03 0.02 0.02 0.02 0.02 0.01 0.02 0.01 0.00 0.00 0.02 0.00 0.01 *CWS 0.01 0.01 0.02 0.01 0.01 0.01 0.00 0.01 0.00 0.00 0.00 0.02 0.01 0.01 0.00 *LPR 0.01 0.02 0.02 0.01 0.01 0.00 0.01 0.01 0.01 0.01 0.01 0.02 0.01 0.02 0.02 0.01 *
FL AL LA TX
…but no Isolation by Distance. What processes are responsible for these patterns of genetic structure?
![Page 23: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/23.jpg)
Summary
• Populations weakly differentiated • No significant isolation by distance • STRUCTURE results found 2 genetic groups • Genetic drift is likely not a dominant force
acting on C. virginica pops • How do either null alleles, life history and
reproductive mode, and recent history of C. virginica affect spatial structure?
![Page 24: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/24.jpg)
Adult Oyster Tissue PAH Analysis (Weinstein, The Citadel)
To date, processed >81 oysters 2010 samples for 14 of 16 priority pollutants from: Big Bend Tampa Bay Rookery Bay
Work to Date
![Page 25: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/25.jpg)
Naphthalene Acenaphthylene Acenaphthene Fluorene
Phenanthrene Anthracene Fluoranthene Pyrene
Benzo(a)anthracene Chrysene Benzo(b)fluoranthene Benzo(k)fluoranthene
Benzo(a)pyrene Dibenz(a,h)anthracene Benzo(g,h,i)perylene Indeno(1,2,3-cd)pyrene
PAH analyses: 16 Priority pollutants
![Page 26: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/26.jpg)
Oyster PAH Data by Site Dec. 2010 – Feb. 2011
GOM Oysters
0
200
400
600
800
1000
1200
1400
Geiger Proffitt Kimbro ‘Mussel Watch’ 2004-2005
ΣPAH
14 (µ
g/kg
)
Tampa Bay Rookery Bay Big Bend
![Page 27: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/27.jpg)
Work to Date Field Ecology
Steve Geiger (Tampa Bay)
David Kimbro (Big Bend)
Ed Proffitt (Rookery &
Johnson Bays)
Loren Coen (Pine Isl CH)
![Page 28: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/28.jpg)
Trays of fresh cultch to assess recruitment by oysters and associated species
FAU MS student, Dana Smith
![Page 29: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/29.jpg)
Bags containing live juvenile oysters (collected locally) marked & deployed for growth analyses
Preliminary Results: Growth not different among regions in Florida….. BUT Growth is still barely more than measurement error at this early stage (2-3 months)
![Page 30: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/30.jpg)
Quadrat samples from natural oyster reefs collected for abundance & size-frequency analyses
Collected 0.135 m2 quadrats
Counted and measured all live & dead oysters; & collected and preserved all associated inverts
![Page 31: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/31.jpg)
Region (Big Bend, Tampa Bay, Pine Isl.-CH Rookery - Johnson)
Sites within Region (3 selected)
Reefs within Sites (5 selected)
Nested Sampling Design
FIXED RANDOM RANDOM
![Page 32: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/32.jpg)
Field Ecology: Regions Reminder
Big Bend
Tampa Bay
Pine Isl – San Car. Bay
Rookery Bay & Johnson Bay
![Page 33: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/33.jpg)
Big Bend X=26.1 ±18.9 Md = 21.0 N=9,500 <10mm = 20%
Tampa Bay X=33.8±19.1 Md=30.0 N=8,357 <10mm= 5%
Pine Isl. – CH X=28.1±16.9 Md=23.9 N=13,682 <10mm=11.2%
Rookery Bay X=37.4±18.7 Md=34.1 N=5,432 <10mm= 2.3%
36,971 oysters measured
![Page 34: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/34.jpg)
Live Oysters by Region & Site(Region)
AH OB SM FD GP PP PIS SCB TB BD JonRok
Num
. Liv
e / m
2 +
/- SD
0
1000
2000
3000
4000
5000
6000
7000
BigBend Tampa Bay PineIsl-CH Rookery
Big Bend Tampa Pine-CH Rookery
Florida Gulf Coast Mean: 2,427.4 ± 1,490.9 Live Oysters / m2 (1 SD), n=57
R2 = 0.83 Region p=0.4627 (Fixed Effect) Site(Region) p<0.0012 (Random Effect) Length p<0.0005 (covariate)
![Page 35: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/35.jpg)
Live <=10mm by Region & Site(Region)
AH OB SM FD GP PP PIS SCB TB BD JonRok
Num
. Liv
e <=
10m
m /
m2
+/-
SD
0
200
400
600
800
1000
1200
1400Big Bend Tampa Pine-CH Rookery
R2 = 0.92 Region p=0.0414 (Fixed Effect) Site(Region) p<0.0001 (Random Effect)
A A B C
Juvenile Oysters
![Page 36: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/36.jpg)
Oyster (post-spill) Densities in Florida Compared to Other GOM states (pre spill): live oysters / m2
2,401
2,057
3,379 1,734
309 315 348
347 344
23 (1000 to >2000 on
some restored sites [J. & M. La Peyre pers
comm], USGS & LSU)
50% of fishery landings
20%
18%
![Page 37: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/37.jpg)
Summary 1. No evidence of PAH in oyster tissues 2. Abundance differences among and within regions
a) Many small oysters in Big Bend in winter 2010 probably from Summer / Fall recruitment event
b) 10x Less recruitment at southernmost region 3. Population genetics samples
a) Florida populations are distinct from others b) Data suggest most recruitment is from local larvae c) Some populations appear to have gone thru a
recent bottleneck 4. ALL data provide a 2010 Baseline Condition for Gulf
coast Florida! (population densities, size-frequency, genetic diversity & connectivity, PAH, associated species abundances)
![Page 38: Oyster Reefs as Critical Habitat: Assessing Short-and-Long ...Ed Proffitt (Rookery & Johnson Bays) Loren Coen (Pine Isl CH) Trays of fresh cultch to assess recruitment by oysters and](https://reader036.fdocuments.us/reader036/viewer/2022070218/612669a570eb745904574ff7/html5/thumbnails/38.jpg)
Questions? Pedro Lara, FAU graduate student, oysters on reefs & mangrove prop roots