Evaluating future climate change exposure of marine habitat in the South East Pacific based on metabolic constraints

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 9

Published: Jan. 5, 2023

Introduction On-going climate change is now recognized to yield physiological stresses on marine species, with potentially detrimental effects ecosystems. Here, we evaluate the prospect of using velocities (CV) metabolic index (Φ) for assessing changes in habitat South East Pacific. Methods Our approach based a species mean ecophysiotype (i.e. model species) and use global Earth System Model simulation (CESM-LE) under RCP 8.5 scenario. The SEP chosen as case study it hosts an Oxygen Minimum Zone seamounts systems sustaining local communities through artisanal fisheries. Results Discussion results indicate that CV Φ pattern mainly constrained by oxygen distribution its sign affected contrasting trends (including re-oxygenation upper OMZ) warming. We further show weakly dependent traits composing Φ, which conveys this metrics some value inferring projected displacement potential viability region where data are scarce. Based sensitivity experiments natural variability, propose general method broad areas exposure regardless species-specific Φ. particular used here, OMZ can be considered “safe” area close 71 derive species. Limitations perspectives work also discussed.

Language: Английский

---

The Juan Fernández Wrasse Malapterus reticulatus in the Continental Shelf of Chile

Austral Ecology, Journal Year: 2025, Volume and Issue: 50(1)

Published: Jan. 1, 2025

ABSTRACT The Juan Fernández Wrasse, Malapterus reticulatus , previously considered endemic to the Desventuradas and Islands, is reported for first time on continental shelf of Chile. Observations were gathered from reports shared by divers spearfishers social media platforms. A machine learning model confirmed these records, providing evidence species presence along coast central Therefore, records expand known range fish.

Language: Английский

---

Research advances and conservation needs for the protection of the Salas y Gómez and Nazca ridges: A natural and cultural heritage hotspot in the southeastern Pacific ocean

Marine Policy, Journal Year: 2024, Volume and Issue: 171, P. 106453 - 106453

Published: Oct. 31, 2024

Language: Английский

---

Borderless conservation: Integrating connectivity into high seas conservation efforts for the Salas y Gómez and Nazca ridges

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: Oct. 11, 2022

Connectivity is essential to consider in area-based marine conservation measures because it greatly impacts vital ecological processes (e.g., recycling nutrients, regulating temperature, sequestering carbon, and supporting the life cycle of species). However, generally not well studied or integrated into measures, particularly Southeast Pacific. This region home Salas y Gómez Nazca ridges, two adjacent seamount chains that stretch between Peruvian coast Rapa Nui (i.e., Easter Island). The area has been recognized for its exceptional natural cultural significance as one most important global areas protect. over 73% ridges are beyond national jurisdiction, where they unprotected under threat. study provides a synthesis what we know about connectivity practical recommendations integrating this knowledge management region. While data on still limited, should constrain development which be co-designed co-developed, leveraging expertise international working groups throughout Due their high rates endemism, importance migratory corridors, enacting large-scale would address considerations both endemism. Enacting such only elevate an exemplary case study, providing lessons other regions seeking implement similar but could also help raise awareness severity externally originating threats like climate change plastic pollution audiences.

Language: Английский

---

Population Genetics of Chilean Jack Mackerel, Trachurus murphyi Nichols, 1920, (Pisces, Carangidae), in Waters of the South Pacific Ocean

Fishes, Journal Year: 2023, Volume and Issue: 8(3), P. 162 - 162

Published: March 13, 2023

Estimating genetic diversity and population structure with polymorphic markers might provide information for the better management of fish that have economic importance. We used Chilean jack mackerel, Trachurus murphyi, a pelagic species distributed in south Pacific Ocean, to test across its distribution. A total 522 samples were collected from 11 locations 2008, be analyzed using six loci microsatellites. conducted traditional analyses describe T. murphyi whether it shows spatial structure. The results showed high (Ho = 0.551 0.980; He 0.676 0.959). Estimates low non-significant pairwise FST all comparisons. supported non-genetic differentiation previously reported microsatellite panel. Further comparative temporal studies should identify stability this pattern. Overall, study reinforces hypothesis that, mackerel correspond large single population.

Language: Английский

---

Integrating genetic and biophysical approaches to estimate connectivity in an isolated, insular system: case of the culturally important marine gastropod Monetaria caputdraconis

Journal of the Marine Biological Association of the United Kingdom, Journal Year: 2023, Volume and Issue: 103

Published: Jan. 1, 2023

Abstract Population connectivity has a fundamental role in metapopulation dynamics with important implications for population persistence space and time. Oceanic islands, such as Easter Island (EI) the Salas & Gómez (SG), are ideal study of because they separated by 415 km isolated from other islands Pacific Ocean >2000 km. Considering that dispersal process could play critical their populations, we evaluated pattern endemic gastropod Monetaria caputdraconis between EI SG using genetics biophysical modelling. Eleven microsatellite loci did not show differences allelic frequency individuals located SG, suggesting presence one genetic population. Historical reciprocal migration implies 0.49% recruits come 0.37% EI. year-round larval release development 2 weeks plankton, Lagrangian experiment based on regional oceanic simulation indicated weak high rate self-recruitment. Interestingly, self-recruitment showed both monthly interannual variation ranging 1 to 45% returned larvae, lower values estimated compared The results suggest few larvae/individuals arrive at each other's island, possibly due stochastic events, rafting. Overall, our indicate maintain despite distance; these findings have designing conservation strategies this region.

Language: Английский

---

Aumento demográfico del erizo de mar Centrostephanus sylviae en la isla Robinson Crusoe del archipiélago Juan Fernández: Una aproximación biofísica y ecológica.

Published: July 31, 2024

El aumento de la población erizos mar espinas largas (Centrostephanus sylviae) ha adquirido una atención significativa en última década debido al del número individuos reportados como fauna acompañante las trampas langosta Juan Fernández (Jasus frontalis). Además, los riesgos asociados a cambios estructura ecosistema blanqueamiento arrecifes el Archipiélago (JFA) han generado preocupación. En esta investigación se estudió demográfico C. sylviae islas Robinson Crusoe y Santa Clara (RC-SC) través abundancia relativa adultos durante años 2015-2022. Para abordar contribución sus primeras etapas vida adulta modelos biofísicos. Se realizaron simulaciones patrones dispersión larvaria conectividad entre zonas liberación reclutamiento para tres estudio (2013, 2015 2018). Los resultados deriva larval combinados con datos observación programa monitoreo pesca crustáceos ayudaron identificar potenciales (principalmente ubicadas áreas este, sureste suroeste RC-SC). relación rasgos pesquería langostas predador-presa evidente otros ecosistemas semejantes (tal son ejemplo erizo Tasmania-Australia Nueva Zelanda). exploró, un modelo lineal generalizado talla capturadas junto otras variables predictoras (zonas alrededor AJF, meses temporada langosta, series tiempo, profundidad trampas). mostraron que, vez combinadas todas zonas, existía correlación inversa presencia mayor tamaño encontradas islas. Este trabajo pone relieve compleja dinámica ecológica resultante sistema JFA, subrayando importancia preguntamediante enfoques ecosistémicos socioecológicamente integrados.

---

Population genomic and biophysical modeling show different patterns of population connectivity in the spiny lobster Jasus frontalis inhabiting oceanic islands

Marine Environmental Research, Journal Year: 2023, Volume and Issue: 193, P. 106253 - 106253

Published: Nov. 7, 2023

Language: Английский

---

Exploring the establishment of the long-spined sea urchin Centrostephanus sylviae in the Juan Fernández Archipelago, Chile: ecosystem threats and future conservation efforts in a biosphere reserve

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

The Juan Fernández Archipelago (JFA) is a unique ecosystem due to its diversity and high endemism. In recent years there has been an increase in the populations of endemic sea urchin Centrostephanus sylviae, generating negative impacts ecological socio-economic systems archipelago. Here we describe establishment C. sylviae consequences overabundance on subtidal communities, specifically around Robinson Crusoe Santa Clara islands. abundance community-level (i.e., sessile benthic, macroinvertebrates, fishes) were documented by visual surveys using scuba diving at various sites during January 2014 (12 sites), March 2017 2020 (4 2024 (7 sites). Over this time period sylviae abundance (~ 40-50%) was associated with significant decrease biotic benthic cover percentage barren grounds (40-95%). Additionally, star Patiriella calcarata (100%) cucumber Mertensiothuria platei (80%) observed, together biomass wrasse Malapterus reticulatus (95%) trevally, Pseudocaranx chilensis (65%). Although resulted serious problems for main economic activities archipelago lobster fishery recreational diving), it could also be considered opportunity diversify activity through commercialization species, whose biological attributes make attractive gastronomic product. However, create sustainable commercial exploitation, characteristics species socioecological traits need understood generate effective management enforcement strategies. results present study serve as baseline exploring ongoing community changes environments.

Language: Английский

---