Title: Longitudinal and lateral variation in snail assemblages along a floodplain continuum Author:Guan, Qiang; Wu, Haitao; Lu, Kangle; Lu, Xianguo; Batzer, Darold Subject:China ; Connectivity ; Gastropoda ; Habitat quality ; Rapid assessment ; Wetland ; Wusuli River Description:
Emerging theory suggests that biotic communities in floodplain wetlands should change longitudinally along a river’s length and be affected by lateral connectivity of floodplain habitats with main river channels. However, useful invertebrate indicators of floodplain condition remain poorly developed. Snails as a group possess several attributes that should make them useful as potential environmental indicators. In this study, we sampled snail assemblages in 12 floodplain wetlands along Wusuli River (headwater, mid, and downstream reaches) in Northeastern China’s Sanjiang Plain. In addition, at 10 sites, comparisons between river-connected and levee-isolated wetlands were performed. Results demonstrated that snail assemblages were concurrently being impacted by river reach, and whether the wetlands were isolated from the river, or not. Using multivariate analyses, the studied wetlands were divided into three major groups based on snail assemblages: downstream, mid, and headwater reaches. Seven snail species were significant indicators of these wetland groups. Because snail assemblages vary strongly both longitudinally along and laterally across floodplain habitats of Northeastern China, management of floodplains should recognize that landscape position plays an important role in local habitat ecologies, and that efforts to limit hydrologic connectivity across floodplains will have important consequences for resident biota.
Is part of:
Hydrobiologia, 2017, Vol.792(1), pp.345-356
0018-8158 (ISSN); 1573-5117 (E-ISSN); 10.1007/s10750-016-3073-3 (DOI)
Temporal and Spatial Changes in Black Carbon Sedimentary Processes in Wetlands of Songnen Plain, Northeast of China
Title: Theoretical predictions of transverse kinematic imbalance in neutrino-nucleus interactions Author:Pickering, Luke; Lu, Xianguo Subject:High Energy Physics - Phenomenology ; Nuclear Theory Description:
Distributions of transverse kinematic imbalance in neutrino-nucleus interactions in the few GeV regime are sensitive to nuclear effects. We present a study comparing the latest predictions of transverse kinematic imbalance from the interaction simulations, NuWro and GENIE. We dis- cuss the differences between the model predictions. Comment: 5 pages, 9 figures, NuPhys 2015 poster session proceedings
1606.04403 (ARXIV ID)
Title: Theoretical predictions of transverse kinematic imbalance in neutrino-nucleus interactions Author:Pickering, Luke; Lu, Xianguo Contributor:Lu, Xianguo (pacrepositoryorg) Subject:Kinematics Description:
Distributions of transverse kinematic imbalance in neutrino-nucleus interactions in the few GeV regime are sensitive to nuclear effects. We present a study comparing the latest predictions of transverse kinematic imbalance from the interaction simulations, NuWro and GENIE. We dis- cuss the differences between the model predictions.
Is part of:
arXiv.org, Jun 13, 2016
Title: Simulation study on purification efficiency for nitrogen in different types of wetlands in Sanjiang Plain, China Author:Guo, Yue; Jiang, Ming; Lu, Xianguo Subject:wetland ; Deyeuxia angustifolia ; Carex lasiocarpa ; nitrogen ; removal rate ; Sanjiang plain Description:
The purification law of nitrogen in Deyeuxia angustifolia , Carex lasiocarpa and Deyeuxia angustifolia-Carex lasiocarpa combined wetland systems in the Sanjiang Plain, China was studied by field simulation experiment. The results indicate that the removal rates of TN, NH 4 + -N and NO 3 − -N in above three types of wetlands present an obvious logarithm growth trend along with the time. There are evident removal effects for NH 4 + -N and NO 3 − -N in water bodies of wetlands after the 30th day of experiment, with the removal rates over 80.0%, but the removal rate of TN is slightly low, being 63.1%–74.3%. NO 3 − -N is most quickly removed by the combined wetland, and NH 4 + -N by Deyeuxia angustifolia wetland. The removal speeds of TN by the three wetland systems are comparatively slow, of which the Deyeuxia angustifolia wetland is the fastest. In consideration of plant growth season, Deyeuxia angustifolia wetland has much more practical application value in purifying nitrogen. These results can provide references for the study on the purification function of wetlands and the control of non-point source pollution in Northeast China.
Is part of:
Chinese Geographical Science, 2010, Vol.20(3), pp.252-257
1002-0063 (ISSN); 1993-064X (E-ISSN); 10.1007/s11769-010-0252-4 (DOI)
Title: A dynamic change map of marshes in the Small Sanjiang Plain, Heilongjiang, China, from 1955 to 2005 Author:Liu, Jiping; Sheng, Lianxi; Lu, Xianguo; Liu, Yan Subject:Dynamic change map ; Marshes ; Small Sanjiang Plain ; Spatiotemporal correlation map Description:
Geographic information systems and remote sensing technology, combined with geo-information mapping and spatial autocorrelation modeling were here used to investigate the spatial dynamics of marshes of the Small Sanjiang Plain from 1955 to 2005. Results showed that the total marshland of the Small Sanjiang Plain decreased in area by 80.06 %. This loss occurred primarily from 1955 to 1980 through conversion to farmland. Spatially, marshes gradually retreated to the northeast part of the region and to areas close to rivers. Newly formed marshes were usually converted from woodland, farmland, and grassland. The conversion of marshland to agricultural land moved from higher to low elevations and from river terraces to floodplains to meander belts over time. Newly formed marshes currently include several national nature reserves and surrounding areas. From 1955 to 2005, the spatial autocorrelation of marshes gradually weakened in the Small Sanjiang Plain. The global spatial autocorrelation of the Small Sanjiang Plain tended to initially increase then gradually decrease. The marsh spatial autocorrelation peaked in 1965. Human factors played a key role in the changes in the marshes of the Small Sanjiang Plain, especially during four large-scale periods of land development and hydrological projects. Increases in temperature, decreases in precipitation, and reductions in annual runoff are also leading causes of the loss of marshland in the Small Sanjiang Plain. These results may serve as a reference for policy makers and land planners as they formulate protection policies and build wetland nature reserves.
Is part of:
Wetlands Ecology and Management, 2015, Vol.23(3), pp.419-437
0923-4861 (ISSN); 1572-9834 (E-ISSN); 10.1007/s11273-014-9392-0 (DOI)