H2020Индивидуална стипендия2019–2022

BioSIGNAL · Biological pump Sensitivity and climate change: InterroGatiNg past environmentAL perturbations

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-07-01 → 2022-08-31
Финансиране от ЕС: 257 620 €
Участници: 2
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Връзката между климата и морското биоразнообразие се анализира чрез влиянието на разтворения кислород в океана върху животните. Тези данни помагат за подобряване на моделите, които предвиждат последствията от текущите климатични промени.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Biological pump Sensitivity and climate change: InterroGatiNg past environmentAL perturbations

Complex forms of animal Life, including the first representatives of most groups that we know today, appeared in the oceans around 550 million years ago. Paleontological data compilations show that marine Life subsequently diversified to eventually reach the highly diverse ecosystems that we know today. Yet, the evolution of biodiversity throughout geological times is complex, alternating rises and plateaus and sudden falls during the so-called mass extinctions. The drivers of these temporal trends have been the focus of many studies over many decades, but they remain largely unconstrained so far. The BioSIGNAL project aims at improving our understanding of the co-evolution of climate and the marine biosphere. The goal is to shed new light on and provide reading keys to understand the evolution of biodiversity through time. Developing a mechanistic understanding of the response of biodiversity to environmental change is crucial for society. Marine species are an essential resource for human communities. They also constitute a key component of the Earth System and contribute to the regulation of climate at the global scale. But the response of the marine communities to ongoing climate change is uncertain. Studying the past is a key opportunity to gain knowledge that will ultimately permit to improve the next generation of models used to predict the consequences of climate change, hence providing more accurate predictions, and permitting to hopefully adopt the right measures. The project focuses on a previously overlooked potential driver of marine biodiversity: the ocean dissolved oxygen concentration. Indeed, dissolved oxygen is necessary to complex animals. Studies of the present-day ocean confirm that biodiversity suddenly drops in poorly oxygenated regions. It is thus expected that the evolution of marine biodiversity at the geological timescale may have been driven by changes in ocean oxygenation, too. The goal of the BioSIGNAL project is to determine and quantify the relationship between ocean oxygenation and marine biodiversity over the last 550 million years.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The biological pump refers to the mechanism by which carbon is assimilated by photosynthetic algae in the ocean photic zone and subsequently exported to depth upon death of the organisms. The largest part of this export production is generally remineralized as it travels throughout the water column where it depletes dissolved oxygen concentrations. A fraction of the export production may still reach the sea floor, where it is susceptible to be buried, thus inducing a net removal of CO2 from the ocean-atmosphere system. Therefore, the good appraisal of the response of the biological pump to changing environmental conditions is crucial to reasonably predict climate and ocean oxygenation impacts, both associated with past events and as will result from ongoing anthropogenic emissions. However, the behavior of the ecological system in the face of climatic changes and how it impacts the strength and efficiency of the biological pump remains difficult to predict. To address this, here I propose to investigate the sensitivity of the biological pump in a novel way – using a state-of-the-art ecological model including a representation of marine biogeochemical cycles. I will focus on past periods, which provide a whole evolutionary chronicle to which model outputs can be directly compared. Confrontation of model results with geological records will also allow me to develop a mechanistic understanding of the behavior of the ecological system in response to a wide range of environmental perturbations. The proposed approach constitutes an unrivaled opportunity to increase our understanding of the geological record and what it can tell us of relevance to the future. Lessons learned here, both positive and negative, have the potential to help inform the next generation of marine ecosystem models needed to make improved projections of future global change impacts on ocean ecosystems, and hence engaging a broad range of global change scientists and ultimately, policy makers.

Оригинален текст от CORDIS (на английски).

Участници

COMMUNAUTE D' UNIVERSITES ET ETABLISSEMENTS UNIVERSITE BOURGOGNE - FRANCHE - COMTE · BesanconКоординаторФранция
The Regents of the University of California, on behalf of its Riverside campus · RiversideСъединени щати