A hyperbaric and thermal physiological bottleneck at bathyal depths is thought to contribute to bathymetric zonation of marine benthic invertebrates and demersal fishes on deep continental margins. The focus of this thesis was to investigate hyperbaric tolerance in the lithodid crab Lithodes maja as a case study for the effects of hydrostatic pressure on upper bathyal marine ectotherms. Experimental hyperbaric exposures revealed that hyperbaric tolerance is oxygen- and capacity-limited. Hyperbaric tolerance appears proximately oxygen-limited, but ultimately limited by cardiac capacity: adverse hyperbaric impacts on cardiac capacity appear mediated by the effects of pressure on membranes and membrane related functions. However, bathymetric range appears constrained by increased metabolic cost at elevated hydrostatic pressure. Hyperbaric limitation of bathymetric range supports a role for hydrostatic pressure in structuring bathymetric zonation in the deep sea, and lineage-specific physiological tolerances appear to contribute to global phylogenetic bottlenecks. Further, physiological effects of high hydrostatic pressure and low temperature at bathyal depths, acting on shallow-water taxa at the lower limits of their distribution, may invoke a stress–evolution mechanism. The resulting bathymetric variation in speciation rates could drive a unimodal diversity–depth pattern, typically peaking at bathyal depths, over time. Marine ectotherms’ thermal tolerance is also oxygen- and capacity-limited, and functionally associated with hypoxia tolerance. Comparing hypoxia thresholds and hyperbaric thresholds of taxonomic groups of shallow-water fauna revealed significant correlation, supporting the proposition that hydrostatic pressure tolerance is oxygen- limited. Consequently, it appears that the combined effects of temperature, pressure, and oxygen concentration constrain the fundamental ecological niches of marine invertebrates and fishes. Including depth in a conceptual model of oxygen- and capacity-limited fundamental ecological niches’ responses to ocean warming and deoxygenation confirms that polar taxa are most vulnerable to the effects of climate change, but reveals for the first time that temperate fauna as well as tropical fauna may experience substantial fundamental ecological niche expansion with ocean warming and deoxygenation.

The role of hydrostatic pressure in constraining the bathymetric distribution of marine ectotherms

Pressure and Reactive Oxygen Species

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

C. Moisan

Author Tools

Chat about Author

Papers

Pressure and Reactive Oxygen Species