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Jiang H.,Northeast Normal University | Wen Y.,Northeast Normal University | Zou L.,Northeast Normal University | Wang Z.,Northeast Normal University | And 2 more authors.
Ecological Engineering | Year: 2016

An assessment of wetland restoration project and their restoration impacts can provide a reference for effective management and habitat improvements. In this paper, a monitoring program was conducted before and after the stopover habitat of the Siberian crane (Grus leucogeranus) was restored. The results indicated that the Siberian crane population and its primary food (Scirpus planiculmis) distribution area increased in the first three years of the restoration project relative to the levels prior to the project. The daily water levels ranged from approximately -20. cm to 20. cm, which is ideal for a stopover habitat for this waterbird. An obvious effect was observed as a result of the restoration of Siberian crane habitat. However, Siberian crane numbers sharply decreased in the later period of the restoration project to 10-40% of the values prior to restoration. The average daily water level was approximately 60. cm, and the distribution area of S. planiculmis decreased, which affected the incidence of Siberian crane stopovers. Furthermore, an effective water management strategy was established to protect Siberian crane populations and habitats. In summer, continuous water supplementation based on varying water demands was used to guarantee the growth of S. planiculmis and provide a suitable water level for Siberian crane stopovers in autumn. At the end of autumn, rapid water supplementation was used to maintain suitable water levels for the following spring. These results can serve as a reference point for protecting and restoring similar waterbird habitats. © 2016 Elsevier B.V.

Jiang H.,Northeast Normal University | He C.,Northeast Normal University | Sheng L.,Northeast Normal University | Tang Z.,Northeast Normal University | And 3 more authors.
PLoS ONE | Year: 2015

Habitat loss is one of the key factors underlying the decline of many waterbird species, including Siberian Crane (Grus leucogeranus), a threatened species worldwide. Wetlands are the primary stopover for many waterbirds and restoration of these wetlands involves both hydrological restoration and water resource management. To protect the stopover sites of Siberian Cranes, we collected Siberian Crane stopover numbers, meteorological and hydrological data, and remote sensing data from 2008 to 2011 in Momoge National Nature Reserve, one of the largest wetlands in northeastern China. A model was developed to estimate the suitability of Siberian Crane stopover sites. According to our results, the most suitable daily water level for Siberian Cranes between 2008 and 2012 occurred in the spring of 2008 and in the Scirpus planiculmis growing season and autumn of 2010. We suggest a season-dependent water management strategy in order to provide suitable conditions at Siberian Crane stopover sites. © 2015 Jiang et al.

Liu B.,CAS Changchun Northeast Institute of Geography and Agroecology | Liu B.,University of Chinese Academy of Sciences | Jiang M.,CAS Changchun Northeast Institute of Geography and Agroecology | Tong S.,CAS Changchun Northeast Institute of Geography and Agroecology | And 4 more authors.
Ecological Engineering | Year: 2016

Seed burial and water regime are both crucial factors influencing seedling emergence and plant growth in wetlands and thus exert important effects on revegetation in degraded wetlands. We conducted a pot experiment to determine the effects of burial depth and water depth on the seedling emergence and growth of Scirpus planiculmis Fr. Schmidt. Seeds of S. planiculmis were buried at 0, 0.5, 1 and 2. cm depths in plastic pots with non-sterilized sediment under exposed (-5. cm), waterlogged (0. cm) and submerged (5 and 10. cm water depths relative to sediment surface) water regimes. The results showed that the percentage of seedling emergence at a burial depth of 0. cm was enhanced under 10. cm and 5. cm water depths (78.89% and 81.37%, respectively) in comparison to the results under -5. cm and 0. cm water depths (0 and 2.22%, respectively). Seedlings did not grow through the water to the surface and no tuber formed when covered by 10. cm of water. The total biomass per seedling was generally higher at 0.5. cm or 1. cm burial depths than that at other burial depths. The tuber number per seedling was highest at a 0.5. cm burial depth, while the value was lowest at a 0. cm burial depth. Our results provide valuable guidance for the establishment of S. planiculmis from seeds in wetland revegetation programs. © 2015 Elsevier B.V.

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