scholarly journals Disentangling observer error and climate change effects in long‐term monitoring of alpine plant species composition and cover

2019 ◽  
Vol 31 (1) ◽  
pp. 14-25 ◽  
Author(s):  
Andreas Futschik ◽  
Manuela Winkler ◽  
Klaus Steinbauer ◽  
Andrea Lamprecht ◽  
Sabine B. Rumpf ◽  
...  
Keyword(s):  
Climate Change ◽  
Species Composition ◽  
Plant Species ◽  
Plant Species Composition ◽  
Alpine Plant ◽  
Observer Error ◽  
Climate Change Effects ◽  
Long Term Monitoring ◽  
Term Monitoring

scholarly journals Successional dynamics of a 35 year old freshwater mitigation wetland in southeastern New Hampshire

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0251748
Author(s):  
J. Grant McKown ◽  
Gregg E. Moore ◽  
Andrew R. Payne ◽  
Natalie A. White ◽  
Jennifer L. Gibson
Keyword(s):  
Species Composition ◽  
New Hampshire ◽  
Wetland Restoration ◽  
Wetland Mitigation ◽  
Freshwater Wetland ◽  
Compensatory Mitigation ◽  
Avian Community ◽  
Long Term Monitoring ◽  
Term Monitoring

The long-term ecological success of compensatory freshwater wetland projects has come into question based on follow-up monitoring studies over the past few decades. Given that wetland restoration may require many years to decades to converge to desired outcomes, long-term monitoring of successional patterns may increase our ability to fully evaluate success of wetland mitigation projects or guide adaptive management when needed. In Portsmouth, New Hampshire a 4 ha wetland was constructed in an abandoned gravel quarry as off-site compensatory mitigation for impacts to a scrub-shrub swamp associated with property expansion. Building upon prior evaluations from 1992 and 2002, we conducted a floral survey in 2020 to compare results with prior surveys to document vegetation successional trends over time. In addition, we monitored the avian community throughout the growing season as a measure of habitat quality. The plant community mirrored documented successional trends of freshwater wetland restoration projects as native hydrophytes dominated species composition. Plant species composition stabilized as the rate of turnover, the measurement of succession, declined by nearly half after 17 years. Researchers should consider long-term monitoring of specific sites to better understand successional patterns of created wetlands as we documented long time frames required for the development of scrub-shrub swamps, red maple swamps, and sedge meadows. High species richness was attributed to beaver activity, topographic heterogeneity from Carex stricta tussocks, and the seed bank from the application of peat from the original wetland. Habitat heterogeneity of open water, herbaceous cover, and woody vegetation supports a diverse avian community including 11 wetland dependent species. Although the mitigation project has not created the full area of lost scrub-shrub swamp after 35 years, it has developed a structurally complex habitat and diverse avian community that effectively provides the functions and values of the impacted system.

Assessment of alpine summit flora in Kashmir Himalaya and its implications for long-term monitoring of climate change impacts

2020 ◽  
Vol 17 (8) ◽  
pp. 1974-1988
Author(s):  
Maroof Hamid ◽  
Anzar Ahmad Khuroo ◽  
Akhtar Hussain Malik ◽  
Rameez Ahmad ◽  
Chandra Prakash Singh
Keyword(s):  
Climate Change ◽  
Climate Change Impacts ◽  
Kashmir Himalaya ◽  
Long Term Monitoring ◽  
Term Monitoring

Using long-term monitoring to investigate the changes in species composition in the harbour of Ghent (Belgium)

Hydrobiologia ◽  
2010 ◽  
Vol 663 (1) ◽  
pp. 155-166 ◽  
Author(s):  
Pieter Boets ◽  
Koen Lock ◽  
Peter L. M. Goethals
Keyword(s):  
Species Composition ◽  
Long Term Monitoring ◽  
Term Monitoring

scholarly journals LONG-TERM MONITORING OF WATER DYNAMICS IN THE SAHEL REGION USING THE MULTI-SAR-SYSTEM

2016 ◽  
Vol XLI-B8 ◽  
pp. 313-320 ◽  
Author(s):  
A. Bertram ◽  
A. Wendleder ◽  
A. Schmitt ◽  
M. Huber
Keyword(s):  
Climate Change ◽  
Human Population ◽  
Dynamic Change ◽  
Open Water ◽  
Water Dynamics ◽  
Long Term Monitoring ◽  
Sar Data ◽  
Sahel Region ◽  
Term Monitoring

Fresh water is a scarce resource in the West-African Sahel region, seasonally influenced by droughts and floods. Particularly in terms of climate change, the importance of wetlands increases for flora, fauna, human population, agriculture, livestock and fishery. Hence, access to open water is a key factor. Long-term monitoring of water dynamics is of great importance, especially with regard to the spatio-temporal extend of wetlands and drylands. It can predict future trends and facilitate the development of adequate management strategies. Lake Tabalak, a Ramsar wetland of international importance, is one of the most significant ponds in Niger and a refuge for waterbirds. Nevertheless, human population growth increased the pressure on this ecosystem, which is now degrading for all uses. The main objective of the study is a long-term monitoring of the Lake Tabalak’s water dynamics to delineate permanent and seasonal water bodies, using weather- and daytime-independent multi-sensor and multi-temporal Synthetic Aperture Radar (SAR) data available for the study area. Data of the following sensors from 1993 until 2016 are used: Sentinel-1A, TerraSARX, ALOS PALSAR-1/2, Envisat ASAR, RADARSAT-1/2, and ERS-1/2. All SAR data are processed with the Multi-SAR-System, unifying the different characteristics of all above mentioned sensors in terms of geometric, radiometric and polarimetric resolution to a consistent format. The polarimetric representation in Kennaugh elements allows fusing single-polarized data acquired by older sensors with multi-polarized data acquired by current sensors. The TANH-normalization guarantees a consistent and therefore comparable description in a closed data range in terms of radiometry. The geometric aspect is solved by projecting all images to an earth-fixed coordinate system correcting the brightness by the help of the incidence angle. The elevation model used in the geocoding step is the novel global model produced by the TanDEM-X satellite mission. The advantage of the Multi-SAR-System is that it comprises ortho-rectification, radiometric enhancement, normalization and Kennaugh decomposition, independent from sensors, modes, polarizations or acquisition date of SAR data. In addition, optical satellite data can be included as well, to fill gaps where SAR data are missing due to the special normalization scheme. This kind of pre-processing is exclusively implemented at the Earth Observation Center of the German Aerospace Center in Oberpfaffenhofen, Germany. Therefore, the dynamic change of the open water of the Lake Tabalak could be classified over dry and rainy seasons and years, using different SAR data. The study provides a unique database and contributes to a better understanding of wetland systems in the Sahel region influenced by human pressure and climate change.

Long-term effects of mulching, traditional cutting and no management on plant species composition of improved upland grassland in the Czech Republic

2019 ◽  
Vol 74 (3) ◽  
pp. 463-475 ◽  
Author(s):  
Jan Gaisler ◽  
Lenka Pavlů ◽  
Chukwudi Nwaogu ◽  
Klára Pavlů ◽  
Michal Hejcman ◽  
...  
Keyword(s):  
Czech Republic ◽  
Species Composition ◽  
Plant Species ◽  
Plant Species Composition ◽  
Long Term Effects ◽  
The Czech Republic ◽  
Upland Grassland

scholarly journals Long-term monitoring of an amphibian community after a climate change- and infectious disease-driven species extirpation

2018 ◽  
Vol 24 (6) ◽  
pp. 2622-2632 ◽  
Author(s):  
Jaime Bosch ◽  
Saioa Fernández-Beaskoetxea ◽  
Trenton W. J. Garner ◽  
Luis María Carrascal
Keyword(s):  
Climate Change ◽  
Infectious Disease ◽  
Amphibian Community ◽  
Long Term Monitoring ◽  
Term Monitoring
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