scholarly journals Effects of Environmental Factors and Alien Plant Invasion on Native Floral Diversity in Mt. Manunggal, Cebu Island, Philippines

2018 ◽  
Vol 13 (3) ◽  
pp. 390-402
Author(s):  
JAKE JOSHUA CHI GARCES ◽  
MARY JOYCE LAPA FLORES
Keyword(s):  
Environmental Factors ◽  
Plant Invasion ◽  
Environmental Parameters ◽  
Anthropogenic Disturbances ◽  
The Philippines ◽  
Alien Plants ◽  
Native Plant ◽  
Plant Abundance ◽  
Alien Plant ◽  
Floral Diversity

The status of native floral diversity in Mt. Manunggal, Cebu Island, the Philippines in relation to environmental factors and alien plant invasion has not been recorded and published. To assess factors influencing native plant communities in Mt. Manunggal, a vegetation survey of native and alien plants, as well as selected environmental variables at two sites (Site 1- invaded plot; Site 2- adjacent uninvaded plot) were measured, and anthropogenic disturbances observed using a t-test, regression analysis, and Pearson correlation. For each site, selected environmental parameters, as well as native and alien plant abundance and diversity, were determined last October-November, 2016. There was also a characterization of sites with respect to anthropogenic disturbances. Altitude (t= -14.11, p=0.000), soil temperature (t=2.68, p=0.014), and light intensity (t = -2.61; p=0.016) significantly differed between study sites due to the complex topography and geology of Mt. Manunggal, the variation in floral cover, and degree of anthropogenic activities. Among all environmental factors at both sites, altitude was highly positively correlated to alien plant abundance (r=0.709;p=0.000) at Site 1 while native plant abundance at Site 2 was negatively correlated with soil pH (r=-0.579;p=0.003).There was an apparent domination of alien plants in terms of species richness and abundance at both sites and this could have significantly affected native plant abundance. The strong correlation of environmental parameters to alien plant invasion could favor the continued dominance of alien plant species, resulting in a further decrease of native species.

scholarly journals Major environmental factors and traits of invasive alien plants determine their spatial distribution: a case study in Korea

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Minwoo Oh ◽  
Yoonjeong Heo ◽  
Eun Ju Lee ◽  
Hyohyemi Lee
Keyword(s):  
Environmental Factors ◽  
Alien Species ◽  
Plant Species ◽  
Functional Traits ◽  
Invasive Plants ◽  
Alien Plants ◽  
Summer Temperature ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Cold Spots

Abstract Background As trade increases, the influx of various alien species and their spread to new regions are prevalent, making them a general problem globally. Anthropogenic activities and climate change have led to alien species becoming distributed beyond their native range. As a result, alien species can be easily found anywhere, with the density of individuals varying across locations. The prevalent distribution of alien species adversely affects invaded ecosystems; thus, strategic management plans must be established to control them effectively. To this end, this study evaluated hotspots and cold-spots in the degree of distribution of invasive alien plant species, and major environmental factors related to hot spots were identified. We analyzed 10,287 distribution points of 126 species of alien plant species collected through a national survey of alien species using the hierarchical model of species communities (HMSC) framework. Results The explanatory and fourfold cross-validation predictive power of the model were 0.91 and 0.75 as area under the curve (AUC) values, respectively. Hotspots of invasive plants were found in the Seoul metropolitan area, Daegu metropolitan city, Chungcheongbuk-do Province, southwest shore, and Jeju Island. Hotspots were generally found where the highest maximum summer temperature, winter precipitation, and road density were observed. In contrast, seasonality in temperature, annual temperature range, precipitation during summer, and distance to rivers and the sea were negatively correlated to hotspots. The model showed that functional traits accounted for 55% of the variance explained by environmental factors. Species with a higher specific leaf area were found where temperature seasonality was low. Taller species were associated with a larger annual temperature range. Heavier seed mass was associated with a maximum summer temperature > 29 °C. Conclusions This study showed that hotspots contained 2.1 times more alien plants on average than cold-spots. Hotspots of invasive plants tended to appear under less stressful climate conditions, such as low fluctuations in temperature and precipitation. In addition, disturbance by anthropogenic factors and water flow positively affected hotspots. These results were consistent with previous reports on the ruderal and competitive strategies of invasive plants, not the stress-tolerant strategy. Our results supported that the functional traits of alien plants are closely related to the ecological strategies of plants by shaping the response of species to various environmental filters. Therefore, to control alien plants effectively, the occurrence of disturbed sites where alien plants can grow in large quantities should be minimized, and the waterfront of rivers must be managed.

scholarly journals Alien invasive plants in Belgian limestone quarries

2019 ◽  
pp. 160-164
Author(s):  
Arnaud Monty ◽  
Alexis Jorion ◽  
Carline Pitz ◽  
Charly Géron ◽  
Grégory Mahy
Keyword(s):  
Invasive Plants ◽  
Plant Invasion ◽  
Alien Plants ◽  
Alien Plant ◽  
Buddleja Davidii ◽  
High Conservation ◽  
The Subject ◽  
Limestone Quarries ◽  
Senecio Inaequidens ◽  
Alien Invasive Plants

Description of the subject. Vegetation of high conservation value can establish in quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in quarries in activity. All sectors of the quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled.

scholarly journals The Rate of Regeneration of Native Plant Species After Eradication of Invasive Alien Plant Species (Acacia Decurrens Willd.) in the Limpopo Province, South Africa.

2021 ◽  
Author(s):  
Melford Mbedzi ◽  
Milingoni Peter Tshisikhawe ◽  
Sebataolo Rahlao ◽  
Innocent Ndidzulafhi Sinthumule
Keyword(s):  
Plant Species ◽  
Structural Diversity ◽  
Alien Plants ◽  
Limpopo Province ◽  
Permanent Plots ◽  
Native Plant ◽  
Invasive Alien Plants ◽  
Alien Plant ◽  
Native Plant Species ◽  
Invasive Alien Plant

Abstract Riparian invasive alien plants are known to compete with native plant species for water, space, daylight, and different other resources by decreasing structural diversity of native vegetation and subsequently changing the functioning of the ecosystem. The aim of this study was to investigate the rate of native plant species recolonization after the eradication of A. decurrens. The investigation was done in the Waterberg District Municipality, Limpopo Province in a farm, which is highly infested with A. decurrens. Twenty-four permanent plots of 10 m x 10 m were constructed and the A. decurrens individuals in the plots were removed and the area was monitored for a period of 2 years. The size of quadrats was based on the size and distribution of the invasive alien plants which develop in an aggregated form and have exceptionally small canopies.

scholarly journals Soil fauna may buffer the negative effects of drought on alien plant invasion

2021 ◽  
Author(s):  
Huifei Jin ◽  
Liang Chang ◽  
Mark van Kleunen ◽  
Yanjie Liu
Keyword(s):  
Biomass Production ◽  
Plant Invasion ◽  
Soil Fauna ◽  
Plant Invasions ◽  
Invasion Success ◽  
Native Plant ◽  
Native Community ◽  
Alien Plant ◽  
Grassland Species ◽  
Effects Of Drought

Assessing how climate change affects the potential invasion risk of alien plants has garnered considerable interest in ecology. Although many studies have tested the direct effects of drought on alien plant invasion, less is known about how drought affects alien plant invasion indirectly via other groups of organisms such as soil fauna. To test for such indirect effects, we grew single plant of nine naturalized alien target species in pot mesocosms with a native community of five native grassland species under four combinations of two drought (well-watered vs drought) and two soil-fauna (with vs without) treatments. We found that drought decreased the absolute and the relative biomass production of the alien target plants, and thus reduced their invasion success in the native community. Inoculation with a soil fauna increased the biomass of the native plant community and thereby decreased the relative biomass production of the alien species. The increased invasion resistance due to soil fauna tended (p = 0.09) to be stronger for plants growing under well-watered conditions than under drought. Our multispecies experiment shows for the first time that soil fauna might help native resident communities to resist alien plant invasions, but that this effect might be diminished by drought.

scholarly journals Biological pollution of the flora of Volyn’ Polissya in Ukraine by alien plants

Botanica ◽  
2021 ◽  
pp. 69-76
Author(s):  
Vitaliy VOLODYMYRETS ◽  
Larisa OYTSIUS ◽  
Serhiy HUTSMAN ◽  
Lyubov SAVCHUK
Keyword(s):  
Alien Plants ◽  
Transport Infrastructure ◽  
Native Plant ◽  
Oenothera Biennis ◽  
Alien Plant ◽  
Reynoutria Japonica ◽  
Native Flora ◽  
The Past ◽  
Bidens Frondosa ◽  
Biological Pollution

This study aimed to analyse biological pollution of the native flora of Volyn’ Polissya in Ukraine by alien plant species. According to the research results, 364 alien plants belonging to 228 genera and 68 families were identified in the spontaneous flora of Volyn’ Polissya. The spectrum of the most species-rich families of the alien fraction of the region’s flora includes Asteraceae, Brassicaceae, Poaceae, Rosaceae, Chenopodiaceae, Fabaceae, Lamiaceae, Solanaceae, Caryophyllaceae. As a result of the phytopollution, at least 16 families were included in the region’s flora. Four species currently in a stage of expansion were identified (Reynoutria japonica, Impatiens parviflora, Echinocystis lobata, Bidens frondosa). By origin, the species of the alien fraction of the region’s flora are dominated by the immigrants from the Mediterranean, Iranian-Turan and Atlantic-North American floristic regions. Over the past 30–50 years, at least 80 new species of alien plants have been introduced into the territory of Volyn’ Polissya. Over the past 5–7 years, the speed of the spread and naturalisation rate of species such as Quercus rubra, Asclepias syriaca, Parthenocissus quinquefolia, Prunus cerasifera, Hippophae rhamnoides, Oenothera biennis has increased. These species intensively invade the native plant communities. Phytopollution of Volyn’ Polissya is promoted by the migration of alien species from agricultural lands and escaping from cultivation. This process is also facilitated by urbanisation and the development of transport infrastructure.

scholarly journals Interaction between Nitrogen, Phosphorus, and Invasive Alien Plants

2022 ◽  
Vol 14 (2) ◽  
pp. 746
Author(s):  
Youli Zhang ◽  
Zhanrui Leng ◽  
Yueming Wu ◽  
Hui Jia ◽  
Chongling Yan ◽  
...  
Keyword(s):  
Plant Invasion ◽  
Global Scale ◽  
Plant Litter ◽  
Alien Plants ◽  
Native Plant ◽  
Invasive Alien Plants ◽  
Plant Soil ◽  
Quantitative Studies ◽  
The Stability ◽  
Current Report

Plant invasion is significantly affected by environmental factors in the recipient habitats and affects the stability and sustainable development of society. The invasiveness of alien plants may be increased by anthropogenic-mediated disturbances, such as fluctuations in nutrients caused by excessive emissions of nitrogen (N) and phosphorus (P). To improve our understanding of the interactions between N and P fluctuations and invasive alien plants, the current report focuses on the biogeochemical behavior of N and P among invasive alien plants, native plants, and the soil within the plant–soil ecosystem. Our research, together with a synthesis of the literature, shows that fluctuations in N and P resources provide more opportunities and competitiveness for plant invasion. At the same time, the biogeochemical cycles of N and P are promoted because of their efficient and increased utilization and rate of release by invasive alien plants. However, there is no consensus on whether the N and P compositions of invasive species are different from those of the natives in their habitat. Quantitative studies that compare N and P contents in plant, litter, and soil between native plant communities and invaded communities on a global scale are an indispensable area of research focus for the future.

scholarly journals Spatially Varying Relationships between Alien Plant Distributions and Environmental Factors in South Korea

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1377
Author(s):  
Jeong-Soo Park ◽  
Hyohyemi Lee ◽  
Donghui Choi ◽  
Youngha Kim
Keyword(s):  
Environmental Factors ◽  
South Korea ◽  
Least Squares ◽  
Alien Species ◽  
Ordinary Least Squares ◽  
Alien Plants ◽  
Economic Losses ◽  
Least Squares Regression ◽  
Alien Plant ◽  
Plant Distributions

Invasive alien plants can severely threaten biodiversity and cause economic losses in the agricultural industry; therefore, identifying the critical environmental factors related to the distribution of alien plants plays a crucial role in ecosystem management. In this study, we applied partial least squares regression (PLSR) and geographically weighted regression (GWR) to estimate the important environmental factors affecting the spread of two invasive and expansive plants, Lactuca scariola L. and Aster pilosus Willd., across South Korea. GWR provides more accurate predictions than ordinary least squares regression, and the local coefficients of GWR allow for the determination of the spatial relationships between alien plant distributions and environmental variables. Based on the model’s results, the distributions of these alien species were significantly associated with anthropogenic effects, such as human population density, residential area, and road density. Furthermore, the two alien species can establish themselves in habitats where native plants cannot thrive, owing to their broad tolerance to temperature and drought conditions. This study suggests that urban development and expansion can facilitate the invasion of these species in metropolitan cities.

Role of Horses as Potential Vectors of Non-Native Plant Invasion: An Overview

2020 ◽  
Vol 40 (3) ◽  
Author(s):  
Lauren D. Quinn ◽  
Adda Quinn ◽  
Mietek Kolipinski ◽  
Bonnie Davis ◽  
Connie Berto ◽  
...  
Keyword(s):  
Plant Invasion ◽  
Native Plant
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