DNA and dispersal models highlight constrained connectivity in a migratory marine megavertebrate

Eugenia Naro-Maciel, Kristen M. Hart, Rossana Cruciata, Nathan F. Putman

Research output: Contribution to journalArticle

Abstract

Population structure and spatial distribution are fundamentally important fields within ecology, evolution, and conservation biology. To investigate pan-Atlantic connectivity of globally endangered green turtles Chelonia mydas from two National Parks in Florida, USA, we applied a multidisciplinary approach comparing genetic analysis and ocean circulation modeling. The Everglades (EP) is a juvenile feeding ground, whereas the Dry Tortugas (DT) is used for courtship, breeding, and feeding by adults and juveniles. We sequenced two mitochondrial segments from 138 turtles sampled there from 2006–2015, and simulated oceanic transport to estimate their origins. Genetic and ocean connectivity data revealed northwestern Atlantic rookeries as the major natal sources, while southern and eastern Atlantic contributions were negligible. However, specific rookery estimates differed between genetic and ocean transport models. The combined analyses suggest that post-hatchling drift via ocean currents poorly explains the distribution of neritic juveniles and adults, but juvenile natal homing and population history likely play important roles. DT and EP were genetically similar to feeding grounds along the southern US coast, but highly differentiated from most other Atlantic groups. Despite expanded mitogenomic analysis and correspondingly increased ability to detect genetic variation, no significant differentiation between DT and EP, or among years, sexes or stages was observed. This first genetic analysis of a North Atlantic green turtle courtship area provides rare data supporting local movements and male philopatry. The study highlights the applications of multidisciplinary approaches for ecological research and conservation.

Original languageEnglish (US)
Pages (from-to)586-597
Number of pages12
JournalEcography
Volume40
Issue number5
DOIs
StatePublished - May 1 2017

Fingerprint

Chelonia mydas
connectivity
turtle
DNA
feeding ground
oceans
genetic analysis
courtship
genetic techniques and protocols
circulation modeling
philopatry
water currents
ocean
turtles
population structure
genetic variation
national parks
national park
breeding
spatial distribution

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

DNA and dispersal models highlight constrained connectivity in a migratory marine megavertebrate. / Naro-Maciel, Eugenia; Hart, Kristen M.; Cruciata, Rossana; Putman, Nathan F.

In: Ecography, Vol. 40, No. 5, 01.05.2017, p. 586-597.

Research output: Contribution to journalArticle

Naro-Maciel, Eugenia ; Hart, Kristen M. ; Cruciata, Rossana ; Putman, Nathan F. / DNA and dispersal models highlight constrained connectivity in a migratory marine megavertebrate. In: Ecography. 2017 ; Vol. 40, No. 5. pp. 586-597.
@article{4403de5df4694fcb8451780c5d8d076d,
title = "DNA and dispersal models highlight constrained connectivity in a migratory marine megavertebrate",
abstract = "Population structure and spatial distribution are fundamentally important fields within ecology, evolution, and conservation biology. To investigate pan-Atlantic connectivity of globally endangered green turtles Chelonia mydas from two National Parks in Florida, USA, we applied a multidisciplinary approach comparing genetic analysis and ocean circulation modeling. The Everglades (EP) is a juvenile feeding ground, whereas the Dry Tortugas (DT) is used for courtship, breeding, and feeding by adults and juveniles. We sequenced two mitochondrial segments from 138 turtles sampled there from 2006–2015, and simulated oceanic transport to estimate their origins. Genetic and ocean connectivity data revealed northwestern Atlantic rookeries as the major natal sources, while southern and eastern Atlantic contributions were negligible. However, specific rookery estimates differed between genetic and ocean transport models. The combined analyses suggest that post-hatchling drift via ocean currents poorly explains the distribution of neritic juveniles and adults, but juvenile natal homing and population history likely play important roles. DT and EP were genetically similar to feeding grounds along the southern US coast, but highly differentiated from most other Atlantic groups. Despite expanded mitogenomic analysis and correspondingly increased ability to detect genetic variation, no significant differentiation between DT and EP, or among years, sexes or stages was observed. This first genetic analysis of a North Atlantic green turtle courtship area provides rare data supporting local movements and male philopatry. The study highlights the applications of multidisciplinary approaches for ecological research and conservation.",
author = "Eugenia Naro-Maciel and Hart, {Kristen M.} and Rossana Cruciata and Putman, {Nathan F.}",
year = "2017",
month = "5",
day = "1",
doi = "10.1111/ecog.02056",
language = "English (US)",
volume = "40",
pages = "586--597",
journal = "Ecography",
issn = "0906-7590",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - DNA and dispersal models highlight constrained connectivity in a migratory marine megavertebrate

AU - Naro-Maciel, Eugenia

AU - Hart, Kristen M.

AU - Cruciata, Rossana

AU - Putman, Nathan F.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Population structure and spatial distribution are fundamentally important fields within ecology, evolution, and conservation biology. To investigate pan-Atlantic connectivity of globally endangered green turtles Chelonia mydas from two National Parks in Florida, USA, we applied a multidisciplinary approach comparing genetic analysis and ocean circulation modeling. The Everglades (EP) is a juvenile feeding ground, whereas the Dry Tortugas (DT) is used for courtship, breeding, and feeding by adults and juveniles. We sequenced two mitochondrial segments from 138 turtles sampled there from 2006–2015, and simulated oceanic transport to estimate their origins. Genetic and ocean connectivity data revealed northwestern Atlantic rookeries as the major natal sources, while southern and eastern Atlantic contributions were negligible. However, specific rookery estimates differed between genetic and ocean transport models. The combined analyses suggest that post-hatchling drift via ocean currents poorly explains the distribution of neritic juveniles and adults, but juvenile natal homing and population history likely play important roles. DT and EP were genetically similar to feeding grounds along the southern US coast, but highly differentiated from most other Atlantic groups. Despite expanded mitogenomic analysis and correspondingly increased ability to detect genetic variation, no significant differentiation between DT and EP, or among years, sexes or stages was observed. This first genetic analysis of a North Atlantic green turtle courtship area provides rare data supporting local movements and male philopatry. The study highlights the applications of multidisciplinary approaches for ecological research and conservation.

AB - Population structure and spatial distribution are fundamentally important fields within ecology, evolution, and conservation biology. To investigate pan-Atlantic connectivity of globally endangered green turtles Chelonia mydas from two National Parks in Florida, USA, we applied a multidisciplinary approach comparing genetic analysis and ocean circulation modeling. The Everglades (EP) is a juvenile feeding ground, whereas the Dry Tortugas (DT) is used for courtship, breeding, and feeding by adults and juveniles. We sequenced two mitochondrial segments from 138 turtles sampled there from 2006–2015, and simulated oceanic transport to estimate their origins. Genetic and ocean connectivity data revealed northwestern Atlantic rookeries as the major natal sources, while southern and eastern Atlantic contributions were negligible. However, specific rookery estimates differed between genetic and ocean transport models. The combined analyses suggest that post-hatchling drift via ocean currents poorly explains the distribution of neritic juveniles and adults, but juvenile natal homing and population history likely play important roles. DT and EP were genetically similar to feeding grounds along the southern US coast, but highly differentiated from most other Atlantic groups. Despite expanded mitogenomic analysis and correspondingly increased ability to detect genetic variation, no significant differentiation between DT and EP, or among years, sexes or stages was observed. This first genetic analysis of a North Atlantic green turtle courtship area provides rare data supporting local movements and male philopatry. The study highlights the applications of multidisciplinary approaches for ecological research and conservation.

UR - http://www.scopus.com/inward/record.url?scp=84971406257&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84971406257&partnerID=8YFLogxK

U2 - 10.1111/ecog.02056

DO - 10.1111/ecog.02056

M3 - Article

VL - 40

SP - 586

EP - 597

JO - Ecography

JF - Ecography

SN - 0906-7590

IS - 5

ER -