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Publications (65)
Pomacea canaliculata (Lamarck 1822), a freshwater gastropod indigenous to lower Del Plata Basin of Argentina, has become the most destructive and invasive rice pests in south China since its introduction in the 1980s. In Guangdong, the main production areas for double rice, most of P. canaliculata overwinter in paddy field ditches after late‐rice h...
BACKGROUND
The invasive freshwater snail Pomacea canaliculata is an agricultural pest with a certain level of tolerance to abiotic stress. After the harvest of late rice, the snails usually burrow themselves into the soil surface layers to overwinter and pose a renewed threat to rice production in the following year. Revealing the response of snail...
Pomacea canaliculata, as an invasive exotic species in Asia, can adversely affect crop yields, eco-environment, and human health. Application of molluscicides containing metaldehyde is one effective method for controlling P. canaliculata. In order to investigate the effects of metaldehyde on adult snails, we conducted acute toxicological experiment...
Pomacea canaliculata was by far one of the most harmful invasive organisms in the world, causing serious harm to aquatic crops and ecosystem. Calcium carbonate is a common component of aquatic environment, which is important for the growth of Pomacea canaliculata. Therefore, the objective of this study was to investigate the response characteristic...
The most noxious apple snails (Pomacea canaliculata and P. maculata) native to South America, currently have two distinct invaded ranges in China and the United States. Whether the environmental niches of the two closely related species have changed or remained stable (niche conservatism hypothesis) during the invasion process has become an importa...
Apple snails (ASs), the freshwater snails of the family Ampullariidae, are widely spread in tropical and subtropical regions. Owing to their strong invasiveness and harmful effects on agricultural production and ecosystems, they have attracted considerable attention. However, less research has been conducted on the whole picture of the current rese...
As the frequency of droughts increases with climate change, the tolerance of aquatic organisms to abiotic stressors will become critical determinants of survival. Pomacea canaliculata has become a widely distributed agricultural and environmental pest in southern China. To evaluate their tolerance and adaptation under the drought condition, the sur...
Invasive freshwater species are reported to have tolerance of salinity stress that allows them colonizing new sites in estuaries. Pomacea canaliculata, a gastropod that disperses from its native freshwater habitats to penetrate estuarine environments in invaded regions has raised considerable concern. Previous studies indicated P. canaliculata can...
Pomacea canaliculata is listed among the world’s 100 worst invasive species, for threatening rice production and wetland biodiversity. We compared morphological and genetic characteristics of the 14 P. canaliculata geographic populations in mainland China to explore morphological differentiation in relation to geographical isolation and climate eff...
Rice is widely planted and serves as staple food in the world, but it is often exposed to acid rain and rice blast (Pyricularia oryzae). In this work, we analyzed the effects of co-exposure to simulated acid rain (SAR) and P. oryzae on the photosynthetic growth of rice seedlings. We found that the growth, photosynthesis, and chloroplast ultrastruct...
With the rapid development of the economy, acid rain has become one of the major environmental problems that endanger human health. Being the largest developing country, the environmental problems caused by acid rain are of increasing concern with the rapid industrialization and urbanization in China. Recently, many researchers have focused on acid...
Premise:
Understanding how drought and biomass allocation patterns influence competitive ability can help identify traits related to invasiveness and guide management. Vincetoxicum nigrum and V. rossicum are increasingly problematic herbaceous perennial vines in the northeastern United States and southeastern Canada.
Methods:
Using a greenhouse...
The most noxious apple snails ( Pomacea canaliculata and P. maculata ) native to South America, currently has two distinct invaded ranges in China and the United States. Whether the environmental niches of the two closely related species have changed or remained stable (niche conservatism hypothesis) during the invasion process has become an import...
Pomacea canaliculata, a freshwater snail native to tropical and temperate South America, has become an important invader and agricultural pest throughout tropical and subtropical regions around the world. Colonization of various aquatic habitats by P. canaliculata in coastal regions of South China and its establishment potential in estuaries have r...
The invasive and widespread golden apple snail (GAS, Pomacea canaliculata) is a harmful crop pest in many parts of Asia. The heavy use of molluscicides to control GAS could result in soil and water pollution as well as in loss of biodiversity. A sustainable and pollution-free control method is urgently needed to counteract this invasion. In this st...
• Pomacea canaliculata, a freshwater snail from South America, has rapidly established natural populations from south to north subtropical region in China, since its original introductions in the 1980s. Low temperature in winter is a limiting factor in the geographic expansion and successfully establishment for apple snail populations. There have b...
Pseudomonas syringae pv. Actinidiae (Psa), a causal agent of kiwifruit bacterial canker worldwide, has become a great concern because of the severe epidemics on kiwifruits and the resulting tremendous economic losses. This pathogen affected kiwifruit vines in China as early as 1996 and subsequently spread to the main cultivation areas. Based on occ...
We compared the content of endogenous hormones indole 3 acetic acid (IAA), cytokinin ( CTK)CTK), gibberellin GA 3 ), abscisic acid ( and auxin in Mikania micrantha wilt virus (MMWV) infected and healthy plants using enzyme linked immunosorbent assay ( ELISA ) 1, 4, 7, 10, 13 and 16 days after infection. The results showed that there was positive co...
Successful establishment of invasive plant species may exert important effects on soil organisms and processes. To investigate the response of the soil meso‐ and micro‐fauna community to Ambrosia artemisiifolia L. invasion and its age of colonization, samples were collected from three different depths in sites with and without the presence of A. ar...
Herbicides and insecticides are widely used in modern agriculture. It has been reported in various studies that application of insecticides can increase tolerance of herbivorous insects to insecticides. However, limited information exists on susceptibility to insecticides when insects are exposed to herbicides. This study was conducted to investiga...
Based on land-use data collected every five years from 1990 to 2010, we quantified land-use dynamics and resultant effects on the ecosystem services along urban-rural gradients of the Guangzhou-Foshan Metropolitan Area, South China. The urban-rural gradients were set around the urban core cohesion zone with a 10-km-wide buffer zone and the value of...
In insects, cytochrome P450 monooxygenases (P450s or CYPs) are known to be involved in the detoxification and metabolism of insecticides, leading to increased resistance in insect populations.Spodoptera exiguais a serious polyphagous insect pest worldwide and has developed resistance to various insecticides. In this study, a novel CYP3 clan P450 ge...
Amaranthus retroflexus, a troublesome agricultural weed native to North America, has expanded its distribution in large areas of China since its introduction around 1905. Geographical interpretation of changes in their distribution ranges could provide valuable insights on its spatiotemporal invasion patterns and could be used to predict the extent...
Soil organic carbon (SOC) consists of various classes of organic substances that can be pooled as labile and non-labile fractions. Previous studies have suggested that plant invasion increases SOC content, but whether invasion consistently alters SOC fractions remains unclear. Consequently, the present study was conducted to observe the effects of...
The ecological impacts of biological invasion are generalized with difficulty since these impacts are commonly species- or ecosystem-specific. A noxious invasive plant, Chromolaena odorata, has invaded broad regions, but limited attention has been paid to clarify the ecological impacts of this invasive plant on soil carbon (C) and nitrogen (N) stor...
Plant invasion has been reported to affect a mass of soil ecological processes and functions, although invasion effects are often context-, species- and ecosystem- specific. This study was conducted to explore potential impacts of Praxelis clematidea invasion on contents of total and available soil nitrogen (N) and microbial N transformations in a...
Acid rain is one of the severest environmental issues globally. Relative to other global changes (e.g., warming, elevated atmospheric [CO2], and nitrogen deposition), however, acid rain has received less attention than its due. Soil fauna play important roles in multiple ecological processes, but how soil fauna community responds to acid rain remai...
From the land use vector data of Guangzhou-Foshan Metropolitan Area (GFMA) in 1990, 1995, 2000, 2005 and 2010, four types of agriculture and forestry ecosystem (cropland, forestland, garden and water body) were extracted. Then, we evaluated the GFMA's agriculture and forestry ecosystem services value (AESV) based on Costanza's method after adjustin...
Projections of anthropogenically-induced global climate change and its impacts on potential distributions of invasive species are crucial for implementing effective conservation and management strategies. Lantana camara L., a popular ornamental plant native to tropical America, has become naturalized in some 50 countries and is considered one of th...
To reveal the ecophysiological mechanisms underlying the adaptation of M. micrantha to drought stress, three irrigation regimes [normal irrigation (80% field capacity), moderate water stress (40% field capacity) and severe water stress (20% field capacity)] were used in pot experiment. The results showed that: (i) The content of chlorophyll a, chlo...
Wedelia trilobata (L.) Hitchc., an ornamental groundcover plant introduced to areas around the world from Central America, has become invasive in many regions. To increase understanding of its geographic distribution and potential extent of spread, two presence-only niche-based modeling approaches (Maxent and GARP) were employed to create models ba...
We compared the soil chemical properties, enzyme activities and the diversity of soil microorganisms in control soil, rhizosphere soil and non-rhizosphere soil beneath the L. camara invaded area. L. camara invasion significantly increased contents of the soil organic matter, total N,P,K, available N,P and K and also enhanced the level and activitie...
The invasion of Ambrosia artemisiifolia and Ambrosia trifida from their native range to occupy large areas in China has raised considerable concern. Using the maximum entropy (Maxent) method, we developed models for each Ambrosia species, based on occurrence records from both native ranges (North America) and their invaded ranges (e.g. northern and...
This book is part of the "CABI Invasive Series", which addresses all topics relating to invasive species, including biosecurity surveillance, mapping and modelling, economics of invasive species and species interactions in plant invasions. Aimed at researchers, upper-level students and policy makers, titles in the series provide international cover...
The exotic invasive Ambrosia artemisiifolia L. and a native co-occurring species in southern China, Urena lobata L., were compared to investigate the possible protective role of leaf antioxidant systems in the acclimation of invasive plants to different irradiance levels. Antioxidant activities of superoxide dismutase (SOD), peroxidase (POD), and c...
There is currently much interest in the interactions between exotic plants and soil organisms. Exotic invasive species can have profound effects on the microbial community of the soil and positive feedback of soil biota to invasive plants may facilitate their successful invasion. To better understand the impacts of Ambrosia artemisiifolia L. invasi...
Invasion by the exotic herb Ambrosia artemisiifolia L. has become a serious agricultural and environmental problem and of increasing research interest as the species continues its southward spread into subtropical regions of China. To better understand the possible physiological and morphological adaptations of A. artemisiifolia in this region, we...
Pomacea canaliculata Lamarck is an invasive alien species that is very harmful to the ecosystem and rice production in South China.To verify the toxicity and related mechanism of Agave sisalana Perrine to golden apple snail,the toxic effects of aqueous,n-butanol and ethanol extracts of A.sisalana were tested via the snail-immersed method.The effect...
The goal of this study was to quantify the roles of plants and soil in the N2O budget of a cropland in North China. Plant and soil N2O fluxes were measured with transparent and dark plant chambers and soil chambers, respectively, in three adjacent fields of fertilized cotton, fertilized maize and unfertilized soybean. During the observation period,...
Pomacea canaliculata is an invasive alien species very harmful to the rice production in South China. In this paper, an indoor incubation test was conducted to study the differences in the foraging rate and hepatic glycogen content of female and male P. canaliculata, and the self-designed T-maze and three-room connected device were adopted to obser...
Ambrosia artemisiifolia, a notorious exotic weed of Asteraceae family, has invaded successfully in southern China and caused lots of serious damages to native ecosystem. In order to understand the influences of A. artemisiifolia invasion on soil fauna, we surveyed the properties of soil fauna community through sampling in four kinds of field plots...
Purpose
Vertical-flow constructed wetland (VFCW) is a promising technique for wastewater treatment comparable to conventional wastewater treatment plants. The physical, chemical, and biological processes and interactions in a VFCW are highly coupled with water movement, and thus the performance of a VFCW to remove contaminants hinges on a better un...
On the base of the essentials of circular economy and connotations of eco-efficiency, an eco-efficiency index system for assessing the circular economy of Guangdong Province was established with reference to local and international research. By using the established index system, variations in the economy and eco-efficiency for the period from l990...
Water vapor flux and carbon dioxide (CO2) exchange in croplands are crucial to water and carbon cycle research as well as to global warming evaluation. In this study, a standard three-layer feed-forward back propagation neural network technique associated with the Bayesian technique of automatic relevance determination (ARD) was employed to investi...
Investigations were made in May, June, and November 2007 and January 2008 to study the structural characteristics and their seasonal variations of soil meso- and micro-fauna communities in six habitats of three land use types (forest land, constructed grassland and farmland) in Tianhe District of Guangzhou City. The horizontal spatial distribution...
The eddy covariance technique and the cuvette method were used to investigate water use efficiency in an irrigated winter wheat (Triticum asetivum L.)/summer maize (Zea mays L.) rotation system in the North China Plain. The results show that ecosystem water use efficiency (WUEe) changed diurnally and seasonally. Daily maximal WUEe appeared in the m...
This paper analyzed the present status of ecology specialty construction and personnel training in China. It was considered that there existed some problems to be solved, e. g., the contradiction between the rapid development of new subjects in ecology and the relative weakness in personnel qualified to teach, the unbalance between the extensive an...
Knowledge of water vapor and carbon dioxide (CO2) fluxes in agricultural lands is crucial to estimate carbon and water cycles as well as to investigate global warming potentials. In this study, the continuous wavelet transform technique along with cross-wavelet and wavelet coherence methods was applied to characterize half-hourly CO2 flux (Fc) and...
CO2 flux was measured continuously using the eddy covariance technique in a wheat‐maize rotation system in the North China Plains from October 2002 to October 2006. The annual and seasonal variation of ecosystem respiration and the bio‐environmental controls on them were investigated. The results show that ecosystem respiration (Rec) in the croplan...
Least squares support vector machines (LS-SVMs), a nonlinear kemel based machine was introduced to investigate the prospects of application of this approach in modelling water vapor and carbon dioxide fluxes above a summer maize field using the dataset obtained in the North China Plain with eddy covariance technique. The performances of the LS-SVMs...
In this work, datasets of water and carbon fluxes measured with eddy covariance technique above a summer maize field in the North China Plain were simulated with artificial neural networks (ANNs) to explore the fluxes responses to local environmental variables. The results showed that photosynthetically active radiation (PAR), vapor pressure defici...
Zhong Qin Qiang Yu S. Xu- [...]
Zhilin Zhu
Net radiation (Rn), water vapor flux (LE), sensible heat flux (Hs) and soil heat flux (G) were measured above a summer maize field with the eddy-covariance technique, simulation and analysis of water, heat fluxes and crop water use efficiency were made with the RZ-SHAW model at the same time in this study. The results revealed significant diurnal a...