scholarly journals Estimation of the Recent Expansion Rate of Ruspolia nitidula (Orthoptera) on a Regional and Landscape Scale

Insects ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 639
Author(s):  
Oto Kaláb ◽  
Petr Pyszko ◽  
Petr Kočárek
Keyword(s):  
River Basin ◽  
Regional Scale ◽  
Landscape Scale ◽  
Expansion Rate ◽  
Least Cost Path ◽  
The Czech Republic ◽  
Maximum Expansion ◽  
Occurrence Data ◽  
Insect Distribution ◽  
Odra River

Recent changes in insect distribution are consistent with the expected interacting effects of climate and habitat change. The orthopteran Ruspolia nitidula has expanded its area of distribution in Western and Central Europe in recent decades. Because males emit a sound that is easily detected at a distance of up to 40 m, it is possible to detect spreading individuals and to therefore document routes and rates of spread. Using occurrence data at the landscape scale and three methods, including least-cost path analysis with habitat suitability, we estimated the R. nitidula expansion rate from 2006 to 2020 in the Czech Republic; this involved estimating distances between two origin occurrences in 2006 and two occurrences on the area margin in 2020. For comparison, we directly monitored expansion based on detection of singing males at the regional scale at the areal margin in the Odra River basin (2016–2020). The estimated maximum expansion rate ranged from 13.8 to 16.2 km/year based on occurrence data at the landscape scale and from 11.1 to 11.7 km/year based on the monitoring of males in the Odra River basin. To our knowledge, this is the first report of the direct monitoring of individual spreading males to detect changes in the distribution of an orthopteran.

Abatement Strategies in the Odra River Basin

1994 ◽  
Vol 29 (3) ◽  
pp. 347-349
Author(s):  
P. Soldán ◽  
J. Švrcula ◽  
H. O. Ibrekk ◽  
T. Källqvist
Keyword(s):  
Surface Water ◽  
River Basin ◽  
The Baltic Sea ◽  
The Czech Republic ◽  
Abatement Strategies ◽  
Odra River ◽  
Oder River ◽  
The Baltic ◽  
High Level

The Odra (Oder) River flows from the Czech Republic through Poland to the Baltic Sea. Surface water as well as groundwater in the Odra River Basin is heavily polluted, especially in the Ostrava industrial region and its surroundings. The high level of pollution causes considerable impacts on human health and ecology. There is a definite need to develop sound abatement strategies to achieve long term objectives of reducing the deterioration of the environment and to restore the ecological balance in the surface water. This poster presents several related studies and focuses on the Czech-Norwegian one - “Abatement Strategies in the Odra River Basin”.

scholarly journals Accumulation of river run-off through water reservoirs in the upper part of the Odra River basin in the territory of the Czech Republic

Geografie ◽  
2004 ◽  
Vol 109 (1) ◽  
pp. 27-35
Author(s):  
Vladislav Kříž
Keyword(s):  
River Basin ◽  
Water Regime ◽  
Systematic Research ◽  
The Czech Republic ◽  
Water Management System ◽  
Run Off ◽  
Accumulation Effect ◽  
Odra River ◽  
Present World ◽  
World Trend

In accordance with the present world trend, the hydrological research in Czechia has been recently aimed at anthropogenous changes of water regime in the landscape. Systematic research in this sense in the Odra River basin brings a relatively comprehensive view on the "anthropogenous hydrology" of this basin. Reservoirs of the Odra water management system have a significant transformation impact on the water regime of rivers. Especially their accumulation effect is the main subject of this paper.

scholarly journals Investigating the Spatio-Temporal Variation of Soil Moisture and Agricultural Drought towards Supporting Water Resources Management in the Red River Basin of Vietnam

2021 ◽  
Vol 13 (9) ◽  
pp. 4926
Author(s):  
Nguyen Duc Luong ◽  
Nguyen Hoang Hiep ◽  
Thi Hieu Bui
Keyword(s):  
Soil Moisture ◽  
River Basin ◽  
Temporal Dynamics ◽  
Regional Scale ◽  
Dry Season ◽  
Red River ◽  
Agricultural Drought ◽  
Severe Drought ◽  
Red River Basin ◽  
Spatio Temporal

The increasing serious droughts recently might have significant impacts on socioeconomic development in the Red River basin (RRB). This study applied the variable infiltration capacity (VIC) model to investigate spatio-temporal dynamics of soil moisture in the northeast, northwest, and Red River Delta (RRD) regions of the RRB part belongs to territory of Vietnam. The soil moisture dataset simulated for 10 years (2005–2014) was utilized to establish the soil moisture anomaly percentage index (SMAPI) for assessing intensity of agricultural drought. Soil moisture appeared to co-vary with precipitation, air temperature, evapotranspiration, and various features of land cover, topography, and soil type in three regions of the RRB. SMAPI analysis revealed that more areas in the northeast experienced severe droughts compared to those in other regions, especially in the dry season and transitional months. Meanwhile, the northwest mainly suffered from mild drought and a slightly wet condition during the dry season. Different from that, the RRD mainly had moderately to very wet conditions throughout the year. The areas of both agricultural and forested lands associated with severe drought in the dry season were larger than those in the wet season. Generally, VIC-based soil moisture approach offered a feasible solution for improving soil moisture and agricultural drought monitoring capabilities at the regional scale.

scholarly journals Error Correction of Multi-Source Weighted-Ensemble Precipitation (MSWEP) over the Lancang-Mekong River Basin

2021 ◽  
Vol 13 (2) ◽  
pp. 312
Author(s):  
Xiongpeng Tang ◽  
Jianyun Zhang ◽  
Guoqing Wang ◽  
Gebdang Biangbalbe Ruben ◽  
Zhenxin Bao ◽  
...  
Keyword(s):  
Error Correction ◽  
River Basin ◽  
Regional Scale ◽  
Mekong River ◽  
Precipitation Data ◽  
Climate Data ◽  
Hydrological Simulation ◽  
Mekong River Basin ◽  
Precipitation Estimation ◽  
Simulation Results

The demand for accurate long-term precipitation data is increasing, especially in the Lancang-Mekong River Basin (LMRB), where ground-based data are mostly unavailable and inaccessible in a timely manner. Remote sensing and reanalysis quantitative precipitation products provide unprecedented observations to support water-related research, but these products are inevitably subject to errors. In this study, we propose a novel error correction framework that combines products from various institutions. The NASA Modern-Era Retrospective Analysis for Research and Applications (AgMERRA), the Asian Precipitation Highly-Resolved Observational Data Integration Towards Evaluation of Water Resources (APHRODITE), the Climate Hazards group InfraRed Precipitation with Stations (CHIRPS), the Multi-Source Weighted-Ensemble Precipitation Version 1.0 (MSWEP), and the Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks-Climate Data Records (PERSIANN) were used. Ground-based precipitation data from 1998 to 2007 were used to select precipitation products for correction, and the remaining 1979–1997 and 2008–2014 observe data were used for validation. The resulting precipitation products MSWEP-QM derived from quantile mapping (QM) and MSWEP-LS derived from linear scaling (LS) are evaluated by statistical indicators and hydrological simulation across the LMRB. Results show that the MSWEP-QM and MSWEP-LS can better capture major annual precipitation centers, have excellent simulation results, and reduce the mean BIAS and mean absolute BIAS at most gauges across the LMRB. The two corrected products presented in this study constitute improved climatological precipitation data sources, both time and space, outperforming the five raw gridded precipitation products. Among the two corrected products, in terms of mean BIAS, MSWEP-LS was slightly better than MSWEP-QM at grid-scale, point scale, and regional scale, and it also had better simulation results at all stations except Strung Treng. During the validation period, the average absolute value BIAS of MSWEP-LS and MSWEP-QM decreased by 3.51% and 3.4%, respectively. Therefore, we recommend that MSWEP-LS be used for water-related scientific research in the LMRB.

Biology, Management, and Conservation of Lampreys in North America

2009 ◽  
Keyword(s):  
Regional Scale ◽  
Landscape Scale ◽  
Habitat Associations ◽  
Spawning Habitat ◽  
Monitoring Strategies ◽  
Unit Scale ◽  
Few Data ◽  
Management And Conservation ◽  
Coastal Basin ◽  
Broad Scale

<em>Abstract.</em>—Pacific lampreys <em>Entosphenus tridentatus </em>(formerly <em>Lampetra tridentata</em>) and western brook lampreys <em>L. richardsoni</em> are observed in many coastal Oregon basins; however, few data are available to adequately describe their distribution and spawning habitat associations. To document landscape-scale distribution and habitat use of spawning adult lampreys, we conducted biweekly redd surveys at 62 randomly selected sites in Smith River (Umpqua basin, Oregon). Characteristics of lamprey habitat were measured at the redd, habitat unit, and reach scales to quantify available and occupied habitat. Pacific lampreys were found primarily in wider, low-elevation streams, whereas western brook lampreys were more widespread but concentrated in headwater and low-order streams. At the unit scale, unit type and dominant substrate were weakly correlated to presence of spawning lampreys. Both species spawned in gravel rich habitats, predominantly pool tail-outs and low gradient riffles. This study infers habitat associations and broad-scale distribution within a coastal basin to assist in the design of monitoring strategies and population assessments at a regional scale.

scholarly journals Expected changes in water resources availability and water quality with respect to climate change in the Elbe River basin (Germany)

2005 ◽  
Vol 36 (4-5) ◽  
pp. 321-333 ◽  
Author(s):  
Valentina Krysanova ◽  
Fred Hattermann ◽  
Anja Habeck
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
River Basin ◽  
Hydrological Cycle ◽  
Water Discharge ◽  
Regional Scale ◽  
Elbe River ◽  
Elbe River Basin ◽  
The Mean ◽  
The Elbe River

Reliable modelling of climate–water interactions at the river basin and regional scale requires development of advanced modelling approaches at scales relevant for assessing the potential effects of climate change on the hydrological cycle. These approaches should represent the atmospheric, surface and subsurface hydrological processes and take into account their characteristic temporal and spatial scales of occurrence. The paper presents a climate change impact assessment performed for the Elbe River basin in Germany (about 100 000 km2). The method used for the study combines: (a) a statistical downscaling method driven by GCM-predicted temperature trend for producing climate scenarios, and (b) a simulation technique based on an ecohydrological semi-distributed river basin model, which was thoroughly validated in advance. The overall result of the climate impact study for the basin is that the mean water discharge and the mean groundwater recharge in the Elbe basin will be most likely decreased under the expected climate change and diffuse source pollution will be diminished. Our study confirms that the uncertainty in hydrological and water quality responses to changing climate is generally higher than the uncertainty in climate input. The method is transferable to other basins in the temperate zone.

Evaluation of Pollution Degree of the Odra River Basin with Organic Compounds after the 1997 Summer Flood - General Comments

1999 ◽  
Vol 27 (5) ◽  
pp. 343-349 ◽  
Author(s):  
L. Wolska ◽  
W. Wardencki ◽  
M. Wiergowski ◽  
B. Zygmunt ◽  
B. Zabiegała ◽  
...  
Keyword(s):  
Organic Compounds ◽  
River Basin ◽  
Odra River ◽  
Summer Flood

Planned and unplanned fire regimes on public land in south-east Queensland

2020 ◽  
Vol 29 (5) ◽  
pp. 326 ◽  
Author(s):  
Martyn Eliott ◽  
Tom Lewis ◽  
Tyron Venn ◽  
Sanjeev Kumar Srivastava
Keyword(s):  
Fire History ◽  
Fire Regime ◽  
Regional Scale ◽  
Fire Regimes ◽  
The Public ◽  
Asset Protection ◽  
Occurrence Data ◽  
The Individual ◽  
Service State ◽  
Open Forests

Land management agencies in Queensland conduct planned burning for a variety of reasons, principally for management of fuels for human asset protection and biodiversity management. Using Queensland Parks and Wildlife Service’s archived manually derived fire reports, this study considered the individual components of the fire regime (extent, frequency and season) to determine variation between planned and unplanned fire regimes in south-east Queensland. Overall, between 2004 and 2015, planned fire accounted for 31.6% and unplanned fire 68.4% of all fire on Queensland Parks and Wildlife Service state-managed land. Unplanned fire was more common in spring (September–October), and planned fire was more common in winter (June–August). Unplanned fire affected 71.4% of open forests and woodlands (148563ha), whereas 58.8% of melaleuca communities (8016ha) and 66.6% of plantations (2442ha) were burnt with planned fire. Mapping fire history at a regional scale can be readily done with existing publicly available datasets, which can be used to inform the assessment of planned burning effectiveness for human asset protection and the management of biodiversity. Fire management will benefit from the continued recording of accurate fire occurrence data, which allows for detailed fire regime mapping and subsequent adaptive management of fire regimes in the public domain.

scholarly journals Evolution and Influencing Factors of Township Spatial Form: A Two-Dimensional Perspective

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yanpeng Gao ◽  
Wenjun Chen
Keyword(s):  
Land Use ◽  
Influencing Factors ◽  
Temporal Evolution ◽  
Morphological Changes ◽  
Fractal Theory ◽  
Center Of Gravity ◽  
Expansion Rate ◽  
Rural Settlements ◽  
Spatial Form ◽  
Maximum Expansion

The countryside is the habitat of food, ecology, and culture, and the indispensable basis for human survival and development. Assessing the spatial and temporal evolution of rural settlements contributes to the promotion of rural scientific developments. This study used the fractal theory, center-of-gravity model, and spatial syntax to analyze the spatial and temporal evolution of Shenyang Ciyutuo Subdistrict and its influencing factors based on geospatial data from 2009‒2019, from the perspectives of internal characteristics and external morphological changes. In terms of the external characteristics, from 2009‒2019, the compactness index increased from 0.414 to 0.454, the expansion rate increased from 1.17% to 3.11%, and the expansion intensity increased from 0.05% to 0.15%. From 2014‒2019, the western part of the subdistrict experienced the maximum expansion rate and expansion intensity. The center-of-gravity of the construction land shifted to the west and southwest. The internal characteristics of land use depended on geographical conditions. Clusters of rural settlements were formed in a north-south direction due to the topography and along the riverside in a band-like manner. From 2009‒2019, the integration level of the subdistrict improved and the scale and number of integration axis increased, forming a multicore tree-shaped structure. Pearson’s correlation analysis showed that urbanization is the main factor affecting the spatial and temporal land-use evolution, with transportation convenience, industrial park, and proximity to the river having little effects. This study provides a theoretical basis for the development of Ciyutuo Subdistrict and provides a reference for the development of similar commercial towns.

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