Ancient sedimentary DNA reveals long-term impact of climate change on northern flora

2020 ◽  
Author(s):  
Inger Alsos ◽  
Keyword(s):  
Climate Change ◽  
Sediment Cores ◽  
Time Lag ◽  
Individual Species ◽  
Long Distance ◽  
Site Specific ◽  
Polar Urals ◽  
Rapid Responses ◽  
Long Term Impact

<p>Arctic and alpine species are disproportionally affected by climate change, and knowledge about their ability to survive or disperse is essential for their long-term conservation. Ancient sedimentary DNA (sedaDNA) has improved as a proxy for reconstructing past floras, and may now be applied in high throughput analyses. Our lab has analysed, or is in the process of analysing, sedaDNA from ~40 long (up to 26 000 years old) and 11 short (0-1000 years old) lake sediment cores from the Europe (Alps, Norway, Svalbard, Iceland, Polar Urals). Both general and site-specific patterns have emerged from these data. For example, the taxa recorded in sedaDNA often indicate a warmer climate than that which has been inferred based on pollen records; this is in concordance with macrofossil evidence. Also, the limits of past northern tree lines may have been underestimated based on pollen studies. Some heathland species, such as Vaccinium spp. and Empetrum, often show a time lag in arrival compared with other species with similar climatic requirements. Thus, despite the fact that they have berries and therefore are well adapted to long-distance dispersal by birds, our data show they are constrained from rapid responses to climate changes. Other patterns are site-specific. For example, we see a stepwise doubling of floristic richness from the Last Glacial Maximum to the Holocene in the Polar Urals, which is barely detectable in the pollen analyses. Further, the majority of taxa with a mainly arctic-alpine distributions survived the early-Holocene climate warming, when shrub and trees entered the region, probably due to a very heterogeneous landscape that allows co-existence of species with different requirements. In contrast, arctic-alpine taxa disappear from the catchment a subset of the lakes studied in North Norway after shrub and forest expansion. Linking this type of information to characteristics of these biogeographic regions may provide useful when planning for future nature reserves. In the near future, the combination of many sites, complete DNA reference libraries, and emerging molecular methods will allow for the tracking of individual species through time and space.</p>

scholarly journals Vulnerability of the North Water ecosystem to climate change

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sofia Ribeiro ◽  
Audrey Limoges ◽  
Guillaume Massé ◽  
Kasper L. Johansen ◽  
William Colgan ◽  
...  
Keyword(s):  
Climate Change ◽  
Sea Ice ◽  
Late Holocene ◽  
Sediment Cores ◽  
Arctic Ecosystems ◽  
Little Auk ◽  
The North ◽  
Water Ecosystem ◽  
North Water

AbstractHigh Arctic ecosystems and Indigenous livelihoods are tightly linked and exposed to climate change, yet assessing their sensitivity requires a long-term perspective. Here, we assess the vulnerability of the North Water polynya, a unique seaice ecosystem that sustains the world’s northernmost Inuit communities and several keystone Arctic species. We reconstruct mid-to-late Holocene changes in sea ice, marine primary production, and little auk colony dynamics through multi-proxy analysis of marine and lake sediment cores. Our results suggest a productive ecosystem by 4400–4200 cal yrs b2k coincident with the arrival of the first humans in Greenland. Climate forcing during the late Holocene, leading to periods of polynya instability and marine productivity decline, is strikingly coeval with the human abandonment of Greenland from c. 2200–1200 cal yrs b2k. Our long-term perspective highlights the future decline of the North Water ecosystem, due to climate warming and changing sea-ice conditions, as an important climate change risk.

scholarly journals Is Customer Satisfaction Driving Revenue A Longitudinal Analysis With Evidence From The Banking Industry

2011 ◽  
Vol 2 (1) ◽  
Author(s):  
Gerhard Winkler ◽  
Markus S. Schwaiger
Keyword(s):  
Customer Satisfaction ◽  
Banking Industry ◽  
Positive Impact ◽  
Time Lag ◽  
Retail Banking ◽  
Long Run ◽  
Long Term Impact ◽  
Insight Into ◽  
Longitudinal Dataset

The connection between customer satisfaction and the financial performance of companies has been under academic scrutiny for quite some time. Evidence regarding the long term impact of customer satisfaction is however relatively scarce. Furthermore, research has so far often neglected potential industry idiosyncrasies in estimating the consequences of changes in customer satisfaction. We provide an insight into the overall long run impact of customer satisfaction on operating revenues based on a longitudinal dataset for the Austrian retail banking industry. Our results corroborate the intuition of a positive long run effect of satisfaction on revenues. We can show, that a time lag of 1,5 years has to elapse for satisfaction to have a positive impact on sales.

scholarly journals Green finance: Pandemic and climate change

2021 ◽  
Vol 234 ◽  
pp. 00042
Author(s):  
Igor Klioutchnikov ◽  
Oleg Kliuchnikov
Keyword(s):  
Climate Change ◽  
Green Economy ◽  
Financial Industry ◽  
Environmental Threats ◽  
Global Pandemic ◽  
Green Finance ◽  
People’S Attitudes ◽  
Long Term Impact ◽  
The Impact

In the last decade, green finance has become an important area of tackling the environmental threats associated with climate change and a prerequisite for sustainable development. The Covid-19 outbreak has drawn additional attention to green finance as an economic mechanism for creating healthy living environments. The article examines the impact of COVID-19 on the financial industry, the participation of green finance in the economic recovery after the pandemic in the direction of considering the Paris Agreement on reducing greenhouse gas emissions. The authors put forward the provision on the existence of causal relationships between the "green" financial and "green" economy: "green" finance (reason) is a mechanism for the formation of a "green" economy (consequence). The impact of green finance on society can be greatly enhanced through changes in lifestyles, the behaviour of people and companies, legislative initiatives and government decisions aimed at protecting the health and the environment; climate change and the pandemic have increased the overall fragility of development and created additional risks that are factored into green finance. The article substantiates the position that the global pandemic will have a long-term impact on people's attitudes towards the environment and on the financing of this area. As uncertainty grows about protecting people from disease and mitigating climate change, green finance may become the mainstream of finance.

scholarly journals Perfect Storm: Climate Change and Tourism

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Serhan Cevik ◽  
Manuk Ghazanchyan
Keyword(s):  
Climate Change ◽  
Extreme Weather Events ◽  
International Tourism ◽  
Weather Events ◽  
Negative Effect ◽  
Climate Vulnerability ◽  
The Caribbean ◽  
Long Term Impact ◽  
Perfect Storm

Abstract While the world’s attention is on dealing with the COVID-19 pandemic, climate change remains a greater existential threat to vulnerable countries that are highly dependent on a weather-sensitive sector like tourism. Using a multidimensional index, this study investigates the long-term impact of climate change vulnerability on international tourism in a panel of 15 Caribbean countries over the period 1995–2017. Empirical results show that climate vulnerability already has a statistically and economically significant negative effect on international tourism revenues across the region. As extreme weather events are becoming more frequent and severe over time, our findings indicate that the Caribbean countries need to invest more in adaptation and mitigation in order to reduce vulnerabilities.

scholarly journals Perfect Storm

2020 ◽  
Vol 20 (243) ◽  
Author(s):  
Serhan Cevik ◽  
Manuk Ghazanchyan
Keyword(s):  
Climate Change ◽  
Extreme Weather Events ◽  
International Tourism ◽  
Weather Events ◽  
Negative Effect ◽  
Adaptation Policies ◽  
Climate Vulnerability ◽  
The Caribbean ◽  
Long Term Impact

While the world’s attention is on dealing with the COVID-19 pandemic, climate change remains a greater existential threat to vulnerable countries that are highly dependent on a weather-sensitive sector like tourism. Using a novel multidimensional index, this study investigates the long-term impact of climate change vulnerability on international tourism in a panel of 15 Caribbean countries over the period 1995–2017. Empirical results show that climate vulnerability already has a statistically and economically significant negative effect on international tourism revenues across the region. As extreme weather events are becoming more frequent and severe over time, our findings indicate that the Caribbean countries need to pursue comprehensive adaptation policies to reduce vulnerabilities to climate change.

scholarly journals Characterisation of long-term climate change by dimension estimates of multivariate palaeoclimatic proxy data

2006 ◽  
Vol 13 (5) ◽  
pp. 485-497 ◽  
Author(s):  
R. Donner ◽  
A. Witt
Keyword(s):  
Climate Change ◽  
Trace Elements ◽  
Sediment Cores ◽  
Quantitative Measure ◽  
Relevant Information ◽  
Size Distributions ◽  
Spatially Extended ◽  
Grain Size Distributions ◽  
Variance Decay

Abstract. The problem of extracting climatically relevant information from multivariate geological records is tackled by characterising the eigenvalues of the temporarily varying correlation matrix. From these eigenvalues, a quantitative measure, the linear variance decay (LVD) dimension density, is derived. The LVD dimension density is shown to serve as a suitable estimate of the fractal dimension density. Its performance is evaluated by testing it for (i) systems with independent components and for (ii) subsystems of spatially extended linearly correlated systems. The LVD dimension density is applied to characterise two geological records which contain information about climate variability during the Oligocene and Miocene. These records consist of (a) abundances of different chemical trace elements and (b) grain-size distributions obtained from sediment cores offshore the East Antarctic coast. The presented analysis provides evidence that the major climate change associated with the Oligocene-Miocene transition is reflected in significant changes of the LVD dimension density. This is interpreted as a change of the interrelationships between different trace elements in the sediment and to a change of the provenance area of the deposited sediment.

scholarly journals Modeling the Effects of Global Change on Ecosystem Processes in a Tropical Rainforest

Forests ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 213
Author(s):  
Ann E. Russell ◽  
William J. Parton
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Functional Group ◽  
Plant Traits ◽  
Biogeochemical Cycles ◽  
Individual Species ◽  
Soil Processes ◽  
Individual Tree ◽  
Forest Biogeochemistry

Research Highlights: Ongoing land-use change and climate change in wet tropical forests can potentially drive shifts in tree species composition, representing a change in individual species within a functional group, tropical evergreen trees. The impacts on the global carbon cycle are potentially large, but unclear. We explored the differential effects of species within this functional group, in comparison with the effects of climate change, using the Century model as a research tool. Simulating effects of individual tree species on biome-level biogeochemical cycles constituted a novel application for Century. Background and Objectives: A unique, long-term, replicated field experiment containing five evergreen tree species in monodominant stands under similar environmental conditions in a Costa Rican wet forest provided data for model evaluation. Our objectives were to gain insights about this forest’s biogeochemical cycles and effects of tree species within this functional group, in comparison with climate change. Materials and Methods: We calibrated Century, using long-term meteorological, soil, and plant data from the field-based experiment. In modeling experiments, we evaluated effects on forest biogeochemistry of eight plant traits that were both observed and modeled. Climate-change simulation experiments represented two climate-change aspects observed in this region. Results: Model calibration revealed that unmodeled soil processes would be required to sustain observed P budgets. In species-traits experiments, three separate plant traits (leaf death rate, leaf C:N, and allocation to fine roots) resulted in modeled biomass C stock changes of >50%, compared with a maximum 21% change in the climate-change experiments. Conclusions: Modeled ecosystem properties and processes in Century were sensitive to changes in plant traits and nutrient limitations to productivity. Realistic model output was attainable for some species, but unusual plant traits thwarted predictions for one species. Including more plant traits and soil processes could increase realism, but less-complex models provide an accessible means for exploring plant-soil-atmosphere interactions.

scholarly journals Sounding the Arctic in Chantal Bilodeau’s Climate Change Plays

2020 ◽  
Vol 32 (1) ◽  
pp. 66-81
Author(s):  
Nassin W. Balestrini
Keyword(s):  
Climate Change ◽  
Canadian Arctic ◽  
The Arctic ◽  
Address Climate Change ◽  
Musical Performances ◽  
Time Space ◽  
Performance Poetry ◽  
Traditional Songs ◽  
Long Term Impact

Quebec-born playwright Chantal Bilodeau has been responding to the challenges of dramatizing anthropogenic climate change by developing an eight-part Arctic Cycle, each play of which is set in one of the nations that claims Arctic territory. Sila (2014) immerses audiences into a complex network of humans, animals, and mythical beings crisscrossing the Canadian Arctic. These movements circle around the Inuit concept of sila, which is the life-giving force of breath and voice. Thus, the sonic world of Sila focuses on voices speaking words, on performance poetry, and on the sounds of breath and wind. Bilodeau’ s second Arctic Cycle play, Forward (2016), addresses the long-term impact of Fridtjof Nansen’s polar exploration of the 1890s on Norway’s economy and society. In terms of sound, Forward features multiple musical performances rangingfrom traditional songs to European opera arias and Lieder to contemporary Norwegian electro-pop. The sonic features of both plays stress interdependence across time, space, as well as (non-)human, earthly, and metaphysical realms. Sila and Forward address climate change in a non-universalizing manner which promotes a heterarchical (rather than hierarchical) aesthetic fit for a growing awareness of planetary relationality.

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