dana clark
DESCRIPTION
http://www.mtm.ac.nz/images/Dana_Clark.pdfTRANSCRIPT
MTM TEAM
TAURANGA MOANA BROADSCALE SURVEY
JULY 2014
SURVEY DESIGN
Dec 2011 - Feb 2012
SUBSTRATE TYPE • Mainly sand
• Similar mud content to other NZ estuaries
• Te Puna & Apata have higher sedimentation
NUTRIENTS
Typical of slightly to moderately enriched estuaries
METALS
• All sites well within guidelines for the protection of marine life
• Te Puna had relatively high levels compared to the rest of the harbour
MARINE ANIMALS AS INDICATORS OF HEALTH
• Physical variables are useful indicators of health
• Animals living within the sediment are exposed to multiple stressors
• Provide integrated assessment of overall health
DEVELOPING BENTHIC HEALTH MODELS
Step 1: Determine the key anthropogenic stressors • Sedimentation (silt/clay) • Nutrients (TP, Chl a) • Contaminants (Cu, Pb) Step 2: Relate gradient to marine animals
SEDIMENTATION
NUTRIENTS
CONTAMINANTS
KEY SPECIES Model Associa+on Species Faunal Group Feeding mode Sedimenta*on Low mud Scoloplos cylindrifer Orbinid polychaete D (surface / sub-‐surface) Scolelepis sp. Spionid polychaete D (surface) Halopyrgus pupoides Gastropod Microalgal and detrital grazer Oligochaeta Oligochaete D High mud Scolecolepides benhami Spionid polychaete D (surface deposit) Heteromastus filiformis Capitellid polychaete D (sub-‐surface deposit) Arthri9ca bifurca Bivalve (deposit feeding) D Nereidae Nereid polychaete P Nutrients Nega*ve Scolelepis sp. Spionid polychaete D (surface) Posi*ve Scolecolepides benhami Spionid polychaete D (surface deposit) Heteromastus filiformis Capitellid polychaete D (sub-‐surface deposit) Amphipoda indeterminata Amphipod Contaminants Nega*ve Orbinia papillosa Orbinid polychaete D Posi*ve Scolecolepides benhami Spionid polychaete D (surface deposit) Heteromastus filiformis Capitellid polychaete D (sub-‐surface deposit) Arthri9ca bifurca Bivalve (deposit feeding) D Amphipoda indeterminata Amphipod
SPECIES RESPONSE CURVES - SEDIMENTATION 5 10 15 20
0.0
0.1
0.2
0.3
0.4
0.5
dens
ity, n
umbe
r per
cor
e
Arthritica bifurca
p > 0.1
5 10 15 20
010
2030
4050
Austrovenus stutchburyi
p < 0.001
5 10 15 20
1020
30
Heteromastus filiformis
p < 0.001
5 10 15 20
02
46
8
dens
ity, n
umbe
r per
cor
e
Macomona liliana
p = 0.0056
5 10 15 20
010
2030
40
Nucula hartvigiana
p < 0.001
5 10 15 20
0.00
0.05
0.10
0.15
0.20
Oligochaeta
p > 0.1
5 10 15 20
01
23
45
dens
ity, n
umbe
r per
cor
e
Orbinia papillosa
p < 0.001
5 10 15 20
24
68
1014
% mud
Scolecolepides benhami
p > 0.1
5 10 15 20
0.0
0.2
0.4
0.6
0.8
% mud
Scolelepis sp.
p > 0.1
5 10 15 20
01
23
45
67
% mud
dens
ity, n
umbe
r per
cor
e
Scoloplos cylindrifer
p < 0.001
5 10 15 20
0.0
0.1
0.2
0.3
0.4
0.5
dens
ity, n
umbe
r per
cor
e
Arthritica bifurca
p > 0.1
5 10 15 20
010
2030
4050
Austrovenus stutchburyi
p < 0.001
5 10 15 20
1020
30
Heteromastus filiformis
p < 0.001
5 10 15 20
02
46
8
dens
ity, n
umbe
r per
cor
e
Macomona liliana
p = 0.0056
5 10 15 20
010
2030
40
Nucula hartvigiana
p < 0.001
5 10 15 20
0.00
0.05
0.10
0.15
0.20
Oligochaeta
p > 0.1
5 10 15 20
01
23
45
dens
ity, n
umbe
r per
cor
e
Orbinia papillosa
p < 0.001
5 10 15 20
24
68
1014
% mud
Scolecolepides benhami
p > 0.1
5 10 15 20
0.0
0.2
0.4
0.6
0.8
% mud
Scolelepis sp.
p > 0.1
5 10 15 20
01
23
45
67
% mud
dens
ity, n
umbe
r per
cor
e
Scoloplos cylindrifer
p < 0.001
% mud
No.
per
cor
e
% mud N
o. p
er c
ore
Cockles
Nut shells
SPECIES RESPONSE CURVES - SEDIMENTATION
ln (% mud)
No.
per
cor
e
Nereididae
OUTCOMES
• Community based models of health of the harbour
• Science and cultural indicators for long term monitoring • Species specific response curves for key species
CONTRIBUTORS • Local iwi • Aaron McCallion (Waka Digital) • Alice Morrison (Bay of Plenty RC Summer Student) • Bruce Gardner (Bay of Plenty Regional Council) • Caine Taiapa (Manaaki Te Awanui) • Cawthron Lab ID team • Chris Battershill (University of Waikato) • David Culliford (Bay of Plenty RC Summer Student) • Derrylea Hardy (Massey University) • Erin Brown (Waka Digital) • Lydia Hale (Manaaki Te Awanui) • Murray Patterson (Massey University) • Nicole Hancock (University of Waikato) • Stephen Park (Bay of Plenty Regional Council)
…plus all the other volunteers that helped!