scholarly journals Reconstructing Long-Term Changes in Avian Populations Using Lake Sediments: Opening a Window Onto the Past

2021 ◽  
Vol 9 ◽  
Author(s):  
Matthew P. Duda ◽  
Kathryn E. Hargan ◽  
Neal Michelutti ◽  
Jules M. Blais ◽  
Christopher Grooms ◽  
...  
Keyword(s):  
Human Impacts ◽  
Limiting Factor ◽  
The Past ◽  
Current State ◽  
Information Gap ◽  
Future Potential ◽  
Wildlife Populations ◽  
Avian Populations ◽  
Term Monitoring

The lack of long-term monitoring data for many wildlife populations is a limiting factor in establishing meaningful and achievable conservation goals. Even for well-monitored species, time series are often very short relative to the timescales required to understand a population’s baseline conditions before the contemporary period of increased human impacts. To fill in this critical information gap, techniques have been developed to use sedimentary archives to provide insights into long-term population dynamics over timescales of decades to millennia. Lake and pond sediments receiving animal inputs (e.g., feces, feathers) typically preserve a record of ecological and environmental information that reflects past changes in population size and dynamics. With a focus on bird-related studies, we review the development and use of several paleolimnological proxies to reconstruct past colony sizes, including trace metals, isotopes, lipid biomolecules, diatoms, pollen and non-pollen palynomorphs, invertebrate sub-fossils, pigments, and others. We summarize how animal-influenced sediments, cored from around the world, have been successfully used in addressing some of the most challenging questions in conservation biology, namely: How dynamic are populations on long-term timescales? How may populations respond to climate change? How have populations responded to human intrusion? Finally, we conclude with an assessment of the current state of the field, challenges to overcome, and future potential for research.

Enabling Community Well-being Self-Monitoring in the Context of Mining: The Naskapi Nation of Kawawachikamach

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Robert Klinck ◽  
Ben Bradshaw ◽  
Ruby Sandy ◽  
Silas Nabinacaboo ◽  
Mannie Mameanskum ◽  
...  
Keyword(s):  
Indigenous Peoples ◽  
Well Being ◽  
Aboriginal Community ◽  
Self Monitoring ◽  
Community Engaged Research ◽  
The Past ◽  
Mineral Development ◽  
Iron Deposits ◽  
Term Monitoring

The Naskapi Nation of Kawawachikamach is an Aboriginal community located in northern Quebec near the Labrador Border. Given the region’s rich iron deposits, the Naskapi Nation has considerable experience with major mineral development, first in the 1950s to the 1980s, and again in the past decade as companies implement plans for further extraction. This has raised concerns regarding a range of environmental and socio-economic impacts that may be caused by renewed development. These concerns have led to an interest among the Naskapi to develop a means to track community well-being over time using indicators of their own design. Exemplifying community-engaged research, this paper describes the beginning development of such a tool in fall 2012—the creation of a baseline of community well-being against which mining-induced change can be identified. Its development owes much to the remarkable and sustained contribution of many key members of the Naskapi Nation. If on-going surveying is completed based on the chosen indicators, the Nation will be better positioned to recognize shifts in its well-being and to communicate these shifts to its partners. In addition, long-term monitoring will allow the Naskapi Nation to contribute to more universal understanding of the impacts of mining for Indigenous peoples.

scholarly journals FORECAST OF THE REFORMATION OF THE KRASNOYARSK RESERVOIR COASTAL ZONE IN THE KURTAK VILLAGE

2019 ◽  
Vol 29 (2) ◽  
pp. 267-278
Author(s):  
G.Yu. Yamskikh ◽  
A.V. Kozhukhovsky ◽  
K.V. Marusin ◽  
E.A. Fedorova
Keyword(s):  
Economic Activity ◽  
Similar Type ◽  
Coastal Processes ◽  
The Past ◽  
The Reformation ◽  
Long Term Monitoring ◽  
Verification Of Models ◽  
The Village ◽  
Term Monitoring

The article presents the analysis and prediction of coastal processes at the site of the Krasnoyarsk reservoir in the village of Kurtak where there are the most intensive processes of coastal reshaping. Over the past 50 years, the coast has receded here by an average of 350 m and continues to actively collapse at a speed of 3-5 m per year. Despite the fact that the intensity of coastal processes in this area has significantly decreased (mainly due to the general decrease in the level of the Krasnoyarsk reservoir), the rate of retreat of the shore is still high. However, it can be concluded that for the researched area the coastal reshaping does not pose a real threat to economic activity in the next 30 years. The article tested various methods of forecasting coastal processes, selected the most appropriate for the shores of a similar type. Verification of models was carried out on the basis of data of long-term monitoring of the site under consideration, which gave the chance to compare results of forecasts on different techniques to real retreat of the coast on this site.

scholarly journals Air quality trends in Europe over the past decade: a first multi-model assessment

2011 ◽  
Vol 11 (7) ◽  
pp. 19029-19087 ◽  
Author(s):  
A. Colette ◽  
C. Granier ◽  
Ø. Hodnebrog ◽  
H. Jakobs ◽  
A. Maurizi ◽  
...  
Keyword(s):  
Air Quality ◽  
Management Strategies ◽  
Anthropogenic Emissions ◽  
Model Assessment ◽  
Transport Models ◽  
The Past ◽  
Current State ◽  
Primary Compounds ◽  
Long Term Trend

Abstract. We discuss the capability of current state-of-the-art chemistry and transport models to reproduce air quality trends and inter annual variability. Documenting these strengths and weaknesses on the basis of historical simulations is essential before the models are used to investigate future air quality projections. To achieve this, a coordinated modelling exercise was performed in the framework of the CityZEN European Project. It involved six regional and global chemistry-transport models (Bolchem, Chimere, Emep, Eurad, OsloCTM2 and Mozart) simulating air quality over the past decade in the Western European anthropogenic emissions hotspots. Comparisons between models and observations allow assessing the skills of the models to capture the trends in basic atmospheric constituents (NO2, O3, and PM10). We find that the trends of primary constituents are well reproduced (except in some countries – owing to their sensitivity to the emission inventory) although capturing the more moderate trends of secondary species such as O3 is more challenging. Apart from the long term trend, the modelled monthly variability is consistent with the observations but the year-to-year variability is generally underestimated. A comparison of simulations where anthropogenic emissions are kept constant is also investigated. We find that the magnitude of the emission-driven trend exceeds the natural variability for primary compounds. We can thus conclude that emission management strategies have had a significant impact over the past 10 yr, hence supporting further emission reductions strategies.

Fire and its impact on avian population dynamics

1997 ◽  
Vol 3 (3) ◽  
pp. 206 ◽  
Author(s):  
G. Barry Baker ◽  
E. Belinda Dettmann ◽  
Stephen J. Wilson
Keyword(s):  
Population Size ◽  
Fire Regimes ◽  
Long Term Study ◽  
Sclerophyll Forest ◽  
In Fire ◽  
Avian Populations ◽  
The Impact ◽  
Term Monitoring ◽  
Probability Of Capture

Survival rate, population size, recruitment and probability of capture, derived from a long-term study of 20 passerine species in wet sclerophyll forest near Canberra, were used to measure the impact of a high intensity wildfire which burnt 70% of the study area. The wildfire significantly affected the population size of 13 species for a period of up to six years following the fire. Survival and recruitment were the least sensitive measures of impact and indicated a significant response to fire for only 2 of 10 species. We detected measurable effects of the fire for 17 of the 20 species studied. Many of these species had returned to prefire levels within three years, but for nine species the effects were still apparent six years later. Mark-recapture methodology provides an effective way of measuring the impact of fire regimes in forest environments. Long-term monitoring programmes should be established in fire-prone forest environments to contribute toward our understanding of fire, and its effect on avian populations. Such programmes have resource implications and researchers are urged to encourage the participation of the amateur bird banding community to contribute to such projects.

Resilience of plant and testate amoeba communities after climatic and anthropogenic disturbances in a Baltic bog in Northern Poland: Implications for ecological restoration

The Holocene ◽  
2016 ◽  
Vol 27 (1) ◽  
pp. 130-141 ◽  
Author(s):  
Mariusz Gałka ◽  
Kazimierz Tobolski ◽  
Aleksandra Górska ◽  
Mariusz Lamentowicz
Keyword(s):  
Human Impacts ◽  
Testate Amoebae ◽  
Ice Age ◽  
Testate Amoeba ◽  
Raised Bogs ◽  
The Past ◽  
Ombrotrophic Peatland ◽  
History Of ◽  
Climate Cooling

This study explores the history of the development of Sphagnum communities in an ombrotrophic peatland – Bagno Kusowo – over the past 650 years, based on high-resolution plant macrofossil and testate amoebae analysis. Our research provided information related to the length of peatland existence and the characteristics of its natural/pristine state before the most recent human impacts. Changes in the Sphagnum communities before human impact could have resulted from climate cooling during the ‘Little Ice Age’ (LIA). In this cold and unstable hydrological period, among vascular plants, Eriophorum vaginatum and Baeothryon caespitosum dominated in the peatland vegetation. Peat-forming Sphagnum communities survived the drainage conducted during the 20th century at the Bagno Kusowo bog. We provide three important messages through this study: (1) testate amoebae reflect similar hydrological trends in two peat cores despite considerable microhabitat variability, (2) average long-term water level 10 cm below the surface should be a target for active bog conservation and (3) sites like Bagno Kusowo are extremely important to preserve the remains of pristine biodiversity (including genetic diversity of plants and protists) that was completely removed from most of the raised bogs in Europe due to human activities, for example, drainage.

scholarly journals The diverse pulsational behaviour of β Cep stars: results from long-term monitoring

2013 ◽  
Vol 9 (S301) ◽  
pp. 417-418 ◽  
Author(s):  
G. Handler
Keyword(s):  
The Past ◽  
Consistent Picture ◽  
Long Term Monitoring ◽  
Frequency Changes ◽  
Term Monitoring

AbstractWe studied seven β Cep stars photometrically over the past ten years. Some showed amplitude variations, some frequency changes, and others exhibited stable pulsations, with no consistent picture yet emerging. Additionally, 12 Lac appears to have a 6.7-yr binary companion.

scholarly journals Rural Poverty and Land Degradation: A Review of the Current State of Knowledge

1998 ◽  
Vol 37 (4II) ◽  
pp. 1053-1070 ◽  
Author(s):  
Sohail Jehangir Malik ◽  
Hina Nazli
Keyword(s):  
World Bank ◽  
Land Degradation ◽  
Rural Poverty ◽  
The Past ◽  
Current State ◽  
The World Bank ◽  
Resource Degradation ◽  
The World ◽  
Short And Long Term

By highlighting the lack of rigorous evidence and calling for a greater understanding of the interaction of the two processes, a recent study [Nelson et al. (1997)] has called into question the strong perception that poverty is both a consequence as well as a cause of resource degradation.1 This perception which is widely held is strongly evident in the writings of the multilateral development agencies such as the World Bank (1990) and IFAD (1992) and exists despite extensive reviews which indicate that the short- and long-term implications of land degradation are not very clear [see Scherr and Yadav (1995)]. Similarly, while knowledge about poverty is expanding rapidly, thanks in large parts to the massive international focus and resources brought to bear on its understanding in the past ten.........................

scholarly journals LONG-TERM MONITORING OF THE EUROPEAN ROLLER (CORACIAS GARRULUS) IN UKRAINE: IS CLIMATE BEHIND THE CHANGES?

2021 ◽  
Author(s):  
Tatiana Shupova ◽  
Volodymyr Tytar
Keyword(s):  
Spatially Explicit ◽  
Climate Data ◽  
Time Intervals ◽  
Coracias Garrulus ◽  
The Past ◽  
Historical Times ◽  
Long Term Monitoring ◽  
European Roller ◽  
Term Monitoring

Since the 1980s there has been a long-term decline in numbers and contraction of range in Europe, including Ukraine. Our specific goals were to reconstruct the climatically suitable range of the species in Ukraine before the 1980s, gain better knowledge on its requirements, compare the past and current suitable areas, infer the regional and environmental variables that best explain its occurrence, and quantify the overall range change in the country. For these purposes we created a database consisting of 347 records of the roller made ever in Ukraine. We employed a species distribution modeling (SDM) approach to hindcast changes in the suitable range of the roller during historical times across Ukraine and to derive spatially explicit predictions of climatic suitability for the species under current climate. SDMs were created for three time intervals (before 1980, 1985-2009, 2010-2021) using corresponding climate data extracted from the TerraClim database. SDMs show a decline of suitable for rollers areas in the country from 85 to 46%. Several factors, including land cover and use, human population density and climate, that could have contributed to the decline of the species in Ukraine were considered. We suggest climate change and its speed (velocity) have been responsible for shaping the contemporary home range of the European roller.

Banking in Africa

2019 ◽  
pp. 1075-1112
Author(s):  
Thorsten Beck ◽  
Robert Cull ◽  
Patricio Valenzuela
Keyword(s):  
Developing Countries ◽  
Financial Services ◽  
Sub Saharan Africa ◽  
Banking Systems ◽  
Financial Innovations ◽  
The Past ◽  
Current State ◽  
Recent Developments ◽  
Sub Saharan

This chapter takes stock of the current state of banking systems across Sub-Saharan Africa and discusses recent developments, including innovations that might help Africa leapfrog more traditional banking models. Using an array of different data, the chapter documents that African banking systems are shallow but stable. African banks are well capitalized and over-liquid, but lend less to the private sector than banks in non-African developing countries. African enterprises and households are less likely to use financial services than their peers in other developing countries, although there has been significant progress over the past decade. The chapter also describes a number of financial innovations across the continent that can help overcome different barriers to financial inclusion and have helped to expand the bankable and the banked population. The chapter ends with discussing current challenges for policymakers and academics, including the lack of (data on) long-term finance and the supervisory challenges stemming from increasing cross-border banking in the region.

scholarly journals How Anesthetic, Analgesic and Other Non-Surgical Techniques During Cancer Surgery Might Affect Postoperative Oncologic Outcomes: A Summary of Current State of Evidence

Cancers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 592 ◽  
Author(s):  
Patrice Forget ◽  
Jose A. Aguirre ◽  
Ivanka Bencic ◽  
Alain Borgeat ◽  
Allessandro Cama ◽  
...  
Keyword(s):  
Randomized Clinical Trials ◽  
Surgical Techniques ◽  
Oncologic Outcomes ◽  
The European Union ◽  
European Network ◽  
Surgical Interventions ◽  
Cancer Resection ◽  
The Past ◽  
Current State

The question of whether anesthetic, analgesic or other perioperative intervention during cancer resection surgery might influence long-term oncologic outcomes has generated much attention over the past 13 years. A wealth of experimental and observational clinical data have been published, but the results of prospective, randomized clinical trials are awaited. The European Union supports a pan-European network of researchers, clinicians and industry partners engaged in this question (COST Action 15204: Euro-Periscope). In this narrative review, members of the Euro-Periscope network briefly summarize the current state of evidence pertaining to the potential effects of the most commonly deployed anesthetic and analgesic techniques and other non-surgical interventions during cancer resection surgery on tumor recurrence or metastasis.

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