Shelf and deep-water benthic macrofauna assemblages from the western Gulf of Mexico: Temporal dynamics and environmental drivers

Hernández-Ávila, Iván; Pech, Daniel; Ocaña, Frank A.; Árcega-Cabrera, Flor; Enríquez, Cecilia

doi:10.1016/j.marenvres.2020.105241

Cited by 13 publications

(10 citation statements)

References 39 publications

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“…This study provides new information about bivalve species richness off the coast of Tamaulipas, Mexico, and yielded the first bivalve species list for the deeper zones of the PFB, complementing the earlier study of benthic macrofauna in the PFB [40]. Live bivalves were extremely rare, with only a single live specimen for each species of Bathyarca glomerula, Macoploma extenuata, and Orthoyoldia solenoides, collected on both the continental shelf and bathyal.…”

Section: Faunal Compositionmentioning

confidence: 63%

“…The study area included the southern Perdido Fold Belt, a section of the Tamaulipas shelf, and the Rio Bravo slope [40]. The PFB is a frontier petroleum exploration province in the GOM, located off the east coast of Mexico [41], with an area of ~272,300 km 2 [10] and water depths between 2000 and 3600 m [42,43] (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…Previous studies [22,27,40,72] also found very low numbers of live bivalve mollusks in these types of habitats, made no distinction between live and dead specimens, and covered a huge area [39,73,74]. Simply because its enormous size, there is a lack of detailed information about the geographical distribution of bivalves across important regions of the Mexican part of the PFB.…”

Section: Insights From Death Assemblagesmentioning

confidence: 99%

“…This suggests that species interactions such as predation and competition may be important factors that shape these communities. For example, bivalves are usually the third-most abundant group of macrofauna [2,40]. With their numerical dominance, bivalves are a major food source for asteroids and decapod crustaceans [2].…”

Section: Spatial Patterns Of Species Diversity and Potential Drivers ...mentioning

confidence: 99%

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Bivalve Diversity on the Continental Shelf and Deep Sea of the Perdido Fold Belt, Northwest Gulf of Mexico, Mexico

et al. 2021

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Mollusk diversity in coastal areas of the Gulf of Mexico (GOM) has been studied extensively, but this is not the case for deep-water habitats. We present the first quantitative characterization of mollusks in shallow and deep waters of the Perdido Fold Belt. The data came from two research cruises completed in 2017. Sediment samples were collected from 56 sites using a 0.25-m2 box corer. We tested hypotheses about spatial patterns of α, β, and γ-diversity of bivalves in two water-depth zones, the continental shelf (43–200 m) and bathyal zone (375–3563 m). A total of 301 bivalves belonging to 39 species were identified. The two zones display similar levels of γ-diversity, but host different bivalve assemblages. In general, α-diversity was higher on the continental shelf, whereas β-diversity was higher in the bathyal zone. These patterns can be explained by the higher input of carbon (energy) to the near-coast shelf zone, as well as by the greater topographic complexity of habitats in the bathyal zone. These results enabled us to propose redirection of sampling efforts for environmental characterization from continental zones to the deep-water zone, especially in the context of environmental assessments during oil and gas exploration and production.

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Section: Faunal Compositionmentioning

confidence: 63%

Section: Methodsmentioning

confidence: 99%

Section: Insights From Death Assemblagesmentioning

confidence: 99%

Section: Spatial Patterns Of Species Diversity and Potential Drivers ...mentioning

confidence: 99%

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Bivalve Diversity on the Continental Shelf and Deep Sea of the Perdido Fold Belt, Northwest Gulf of Mexico, Mexico

et al. 2021

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“…m –2 , highly related to the suspended organic matter load from the Mississippi River (Soliman & Rowe, 2008). At the southern GoM seafloor environments, benthic amphipod assemblages have been reported to occur in canyon, knoll and ridge habitats from the continental edge to the abyssal plain (Winfield et al ., 2006; Hernández-Ávila et al ., 2021), suggesting a taxonomically diverse faunal composition that includes the description of new species recently discovered in the Campeche continental slope (Winfield et al ., 2016; Ortiz et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

Two new genera (Paraeperopeus and Dentimelita) and four new deep-sea amphipod crustacean species of little-known genera (Neohela, Pardaliscella, Pardaliscoides and Tosilus) from the Perdido Fold Belt, Gulf of Mexico

Paz-Ríos

Pech

2021

J. Mar. Biol. Ass.

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Two new genera and six new species of benthic amphipods from the soft sediments of the Perdido Fold Belt region, western Gulf of Mexico, are described. Morphological comparisons of the new species with description of their congeners resulted in the determination of one new genus and one new species of the family Melitidae as Dentimelita lecroyae gen. nov., sp. nov., one new genus and four new species of the family Pardaliscidae as Pardaliscella perdido sp. nov., Paraeperopeus longirostris gen. nov., sp. nov., Pardaliscoides ecosur sp. nov. and Tosilus cigomensis sp. nov., and one new species of the family Unciolidae as Neohela winfieldi sp. nov. The occurrence of the newly described amphipods in the Perdido Fold Belt region represented new geographic range extensions for the genera, including new records of Neohela in the Gulf of Mexico, Pardaliscella and Pardaliscoides in the western Atlantic and Tosilus in the Atlantic.

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Temporal patterns in multiple stressors shape the vulnerability of overwintering Arctic zooplankton

Dania,

Lutier,

Heimböck

et al. 2024

Ecology and Evolution

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The Arctic polar nights bring extreme environmental conditions characterised by cold and darkness, which challenge the survival of organisms in the Arctic. Additionally, multiple anthropogenic stressors can amplify the pressure on the fragile Arctic ecosystems during this period. Determining how multiple anthropogenic stressors may affect the survival of Arctic life is crucial for ecological risk assessments and management, but this topic is understudied. For the first time, our study investigates the complex interactions of multiple stressors, exploring stressor temporal dynamics and exposure duration on a key Arctic copepod Calanus glacialis during the polar nights. We conducted experiments with pulse (intermittent) and press (continuous) exposure scenarios, involving microplastics, pyrene and warming in a fully factorial design. We observed significant effects on copepod survival, with pronounced impacts during later stressor phases. We also detected two‐way interactions between microplastics and pyrene, as well as pyrene and warming, further intensified with the presence of a third stressor. Continuous stressor exposure for 9 days (press‐temporal scenario) led to greater reductions in copepod survival compared to the pulse‐temporal scenario, characterised by two 3‐day stressor exposure phases. Notably, the inclusion of recovery phases, free from stressor exposure, positively influenced copepod survival, highlighting the importance of temporal exposure dynamics. We did not find behaviour to be affected by the different treatments. Our findings underscore the intricate interactions amongst multiple stressors and their temporal patterns in shaping the vulnerability of overwintering Arctic copepods with crucial implications for managing Arctic aquatic ecosystems under the fastest rate of ongoing climate change on earth.

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Shelf and deep-water benthic macrofauna assemblages from the western Gulf of Mexico: Temporal dynamics and environmental drivers

Cited by 13 publications

References 39 publications

Bivalve Diversity on the Continental Shelf and Deep Sea of the Perdido Fold Belt, Northwest Gulf of Mexico, Mexico

Bivalve Diversity on the Continental Shelf and Deep Sea of the Perdido Fold Belt, Northwest Gulf of Mexico, Mexico

Two new genera (Paraeperopeus and Dentimelita) and four new deep-sea amphipod crustacean species of little-known genera (Neohela, Pardaliscella, Pardaliscoides and Tosilus) from the Perdido Fold Belt, Gulf of Mexico

Temporal patterns in multiple stressors shape the vulnerability of overwintering Arctic zooplankton

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