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  1. Article ; Online: Multi-Factor Collaborative Analysis of Conservation Effectiveness of Nature Reserves Based on Remote Sensing Data and Google Earth Engine

    Jin Zhang / Cunyong Ju / Tijiu Cai / Houcai Sheng / Xia Jing

    Remote Sensing, Vol 15, Iss 4594, p

    2023  Volume 4594

    Abstract: Protected areas (PAs) play a crucial role in safeguarding biological resources and preserving ecosystems. However, the lack of standardized and highly operational criteria for evaluating their conservation effectiveness, particularly across different ... ...

    Abstract Protected areas (PAs) play a crucial role in safeguarding biological resources and preserving ecosystems. However, the lack of standardized and highly operational criteria for evaluating their conservation effectiveness, particularly across different ecological types, remains a significant gap in the literature. This study aims to address this gap by constructing a conservation effectiveness evaluation model for two distinct types of PAs in Heilongjiang Province, China: the Zhalong National Nature Reserve (ZlNNR), a wetland ecological reserve; and the Mudanfeng National Nature Reserve (MdfNNR), a forest ecological reserve. We employed various methods, including land use dynamic index, visual analysis of landscape patterns, remote sensing inversion, and a multi-factor comprehensive assessment model, to assess changes in conservation effectiveness from 2000 to 2020. Our findings reveal a contrast between the two PAs. In the ZlNNR, croplands and water bodies increased significantly by 4069.4 ha ( K = 1.5820%) and 2541.58 ha ( K = 3.2692%). In the MdfNNR, impervious lands increased greatly by 65.35 ha ( K = 7.4021%), whereas forest lands decreased by 125 ha ( K = −0.067%). The core area of the two PAs displayed increased landscape regularity, whereas the experimental area showed heightened landscape diversity. In ZlNNR, the MPS L value increased by 134.91%, whereas the PD L value decreased by 57.43%, indicating a more regular landscape pattern. In MdfNNR, the SHDI L value decreased by 110.7%, whereas the PD L value increased by 52.55%, indicating a more fragmented landscape pattern. The area with improved vegetation trends in ZlNNR was 8.59% larger than in MdfNNR, whereas the area with degraded vegetation trends was 4.86% smaller than in MdfNNR. In all years, the high effectiveness area was larger in ZlNNR than in MdfNNR, whereas the medium and low effectiveness areas were smaller in ZlNNR compared to MdfNNR. This study provides a scientifically rigorous assessment method for evaluating the conservation ...
    Keywords Zhalong National Nature Reserve ; Mudanfeng National Nature Reserve ; conservation effectiveness ; Google Earth Engine ; Science ; Q
    Subject code 333 ; 710
    Language English
    Publishing date 2023-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Eco-hydrological responses of the Black Dragon fire in three forested basins in the Daxing’an Mountains, northeast China

    Wenbin Liu / Fubao Sun / Cunyong Ju / Xuanze Zhang / Tijiu Cai / Zhiyang Lan

    Ecological Indicators, Vol 145, Iss , Pp 109623- (2022)

    2022  

    Abstract: Understanding how bushfire affects basin-wide ecohydrological processes is critical for ecological restoration and water supply. However, the mechanisms responsible for post-fire streamflow remain poorly explored in forested basins of China due to ... ...

    Abstract Understanding how bushfire affects basin-wide ecohydrological processes is critical for ecological restoration and water supply. However, the mechanisms responsible for post-fire streamflow remain poorly explored in forested basins of China due to complex scale-dependent relationships between fire-induced forest changes and ecohydrological processes, lack of reasonable design of paired watershed experiments, and especially data scarcity. Here, we re-examine ecohydrological responses of the Black Dragon fire (one of the largest and most damaging forest fires on record globally) on an annual scale in three forest basins (two fire-impacted basins, namely Emuer and Pangu, and a nearly unimpacted basin, Huma) in the Daxing’an Mountains using multiple most recent datasets and methods. We found that the Black Dragon fire decreased annual- and basin-averaged vegetation leaf area, evapotranspiration, interception loss, transpiration, soil moisture, runoff, and discharge capacity in 1987 in the two fire-impacted basins compared with the unimpacted basin. The annual- and basin-averaged evapotranspiration (runoff) did not reduce (increase) as much as that expected with decreased LAI given the precipitation amount in 1987 in the two fire-impacted basins, which properly linked to the quick postfire regrowth of vegetation in the growing season. Vegetation leaf area and productivity can quickly recover in the following two to three years postfire, but the hydrological systems need more than 10 years to adapt this disturbance. These findings improve the understanding of ecohydrological responses to bushfire disturbance and provide scientific evidence for ecological protection and water resources management under intensified natural and anthropogenic disturbances.
    Keywords Ecohydrological processes ; Bushfire ; Forested basins ; Daxing’an Mountains ; Runoff ; ET ; Ecology ; QH540-549.5
    Subject code 550
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Canopy interception loss in a Pinus sylvestris var. mongolica forest of Northeast China

    Li, Yi / Cunyong Ju / Houcai Sheng / Tijiu Cai / Xiuling Man

    Journal of Arid Land. 2015 Dec., v. 7, no. 6

    2015  

    Abstract: Pinus sylvestris var. mongolica is one of the main species to be afforested in deserts of China. But little work has been carried out on the canopy interception loss of this plant species. For researching the canopy interception loss of a natural P. ... ...

    Abstract Pinus sylvestris var. mongolica is one of the main species to be afforested in deserts of China. But little work has been carried out on the canopy interception loss of this plant species. For researching the canopy interception loss of a natural P. sylvestris forest, we observed the gross precipitation, gross snowfall, throughfall and stemflow in a sample plot at the Forest Ecosystem Research Station of Mohe in the Great Khingan Mountains of Northeast China from July 2012 to September 2013. Considering the spatial variability of the throughfall, we increased the area rather than the number of collector and randomly relocated them once a week. The results demonstrated that the throughfall, stemflow, and derived estimates of rainfall and snowfall interception loss during the main rainy and snowy seasons were 77.12%±5.70%, 0.80%, 22.08%±5.51% and 21.39%±1.21% of the incident rainfall or snowfall, respectively. The stemflow didn’t occur unless the accumulated rainfall reached up to 4.8 mm. And when the gross precipitation became rich enough, the stemflow increased with increasing tree diameters. Our analysis revealed that throughfall was not observed when rainfall was no more than 0.99 mm, indicating that the canopy storage capacity at saturation was 0.99 mm for P. sylvestris forest.
    Keywords arid lands ; canopy ; deserts ; forest ecosystems ; forests ; mountains ; Pinus sylvestris ; rain ; snow ; stemflow ; throughfall ; water interception ; China
    Language English
    Dates of publication 2015-12
    Size p. 831-840.
    Publishing place Science Press
    Document type Article
    ZDB-ID 2730950-2
    ISSN 1674-6767
    ISSN 1674-6767
    DOI 10.1007/s40333-015-0013-4
    Database NAL-Catalogue (AGRICOLA)

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