Benjamin Gwinneth- PhD
- Professeur adjoint at Université de Montréal
Benjamin Gwinneth
- PhD
- Professeur adjoint at Université de Montréal
About
15
Publications
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Introduction
I use organic geochemical proxies applied to lake sediment cores to understand ecological responses to climate change in the past
Current institution
Publications
Publications (15)
The analysis of faecal stanols in lake sediment cores offers a novel opportunity to reconstruct human population change, assuming that variability in faecal stanol concentration is a reliable proxy for relative human populations. The ancient lowland Maya of Mesoamerica represents an important ancient society whose demographic dynamics in many locat...
Paleoclimate information has played an instrumental role in showing how fast climate can vary and how large these changes can be. It provided the first vivid demonstration of the relationships between atmospheric greenhouse gas concentrations and surface air temperatures, as well as striking representations of climate change impacts and possible fe...
The Northern Mesoamerican Frontier was a complex multicultural region characterized by frequent human settlement changes and shifts in agricultural conditions during the Late Preclassic period (~400 BCE-150 CE). Here, we report a high-resolution paleoenvironmental record from the varved sedimentary sequence of the crater maar La Alberca which spans...
The United Nations (UN) expectations for 2030 account for a renewable, affordable, and eco-friendly energy future. The 2030 agenda includes 17 different Sustainable Development Goals (SDGs) for countries worldwide. In this work, the 7th SDG: Affordable and Clean Energy, is brought into focus. For this goal, five main challenges are discussed: (i) l...
Faecal stanols in lake sediments have been used as a proxy for human populations in the past in a variety of contexts, with the assumption that variability in faecal stanol concentration or ratios is a reliable proxy for relative catchment-scale human populations. Despite that, the specific controls on faecal stanol concentrations and ratios in lak...
This paper reflects the discussions of early and mid-career researchers (EMCRs) during the World Climate Research Programme Open Science Conference 2023 EMCRs Symposium, to advance climate knowledge for greater transformative power in society and impact on policy-making. These discussions focused on three key priority challenges: how to produce rob...
Owing to its specialised methodology, palaeoecology is often regarded as a separate field from ecology, even though it is essential for understanding long-term ecological processes that have shaped the ecosystems that ecologists study and manage. Despite advances in ecological modelling, sample dating, and proxy-based reconstructions facilitating d...
The ¹⁴C content of sedimentary organic matter (OM) and specific organic molecules provide valuable information on the source and age of OM stored in sediments, but these data are limited for tropical fluvial and lake sediments. We analyzed ¹⁴C in bulk OM, palmitic acid (C16), and long‐chain n‐alkanoic acids (C24, C26, and C28), within fluvial and l...
Paleolimnological evidence indicates the ancient Maya transformed terrestrial ecosystems by felling forest vegetation to construct large civic-ceremonial centers and to expand agriculture. Human settlements influenced lacustrine environments but the effects of Maya activities on aquatic ecosystems remain poorly studied. Here we analyzed a sediment...
Many governments and organisations are currently aligning many aspects of their policies and practices to the Sustainable Development Goals (SDGs). Achieving the SDGs should increase social-ecological resilience to shocks like climate change and its impacts. Here, we consider the relationship amongst the three elements – the SDGs, social-ecological...
Freshwater sediments are important carbon reservoirs, but the extent to which different components of soil or aquatic organic matter (OM) are deposited in these sediments is not well defined. Bulk sediment carbon (δ¹³C) and nitrogen (δ¹⁵N) stable isotope ratios, as well as radiocarbon, are valuable tracers for sediment OM sources, but there are few...
Plain Language Summary
Paleoceanography and Paleoclimatology seeks to reveal past changes in the oceans and the climate, to help us better understand how Earth systems work. Traditionally, it has a strong focus on international networks and cooperation and we have accomplished many international projects. However, we are still facing some major cha...
Greenhouse gas emissions from permafrost organic carbon decomposition in lakes and rivers can accelerate global warming. We used radiocarbon (¹⁴C) measurements to determine the predominant sources of dissolved organic carbon (DOC), particulate organic carbon (POC), dissolved inorganic carbon (DIC), and methane (CH4) in five thermokarst lakes and th...
This article summarises the scientific methods used to study past climate in the Maya Lowlands. It also provides an overview of the strategies employed by the ancient Maya to adapt to natural climate change and address issues associated with their growing population. The Maya response to these challenges, including to severe droughts between 800 an...
Se ha datado radiométricamente (K/Ar) el volcán de Bienvenida, uno
de los volcanes de melilititas olivínicas más representativo de la región
volcánica de Campos de Calatrava. Se ha analizado la roca y las principales fases minerales, lo que ha permitido obtener información sobre las condiciones de formación.
