scholarly journals Distribution and Habitat Preferences of the Invasive Alien Rosa rugosa (Rosaceae) in Archipelago Sea National Park, SW Finland

2017 ◽  
Vol 62 (1) ◽  
pp. 99-115
Author(s):  
Panu Kunttu ◽  
Sanna-Mari Kunttu
Keyword(s):  
National Park ◽  
Habitat Preferences ◽  
Habitat Type ◽  
Sandy Beaches ◽  
Native Plant ◽  
Rosa Rugosa ◽  
Alien Plant ◽  
Invasive Alien Plant ◽  
Archipelago Sea ◽  
Control Work

AbstractRosa rugosa Thunb. is an invasive alien plant which was introduced from East Asia to Europe in the 19th century. Over the decades it has spread along the Finnish coast, including the archipelagos of the Baltic Sea. The shrub grows particularly along sandy beaches, stony shores and seashore meadows. There it leads to serious changes in coastal ecosystems and replaces native plant species. This paper presents the distribution and habitat preferences of R. rugosa in and near Archipelago Sea National Park in SW Finland. We identified 205 stands in the study area, 58% of them in protected areas. Systematic inventories do not cover the whole study area, so it is likely that dozens of stands remain undiscovered. Stands of the species were concentrated on the outer islands, where the archipelago’s most characteristic flora and fauna occur. Data on the shore type and area of all stands were collected. The total area covered by R. rugosa was 7277 m2 before control work started in 2008. The largest stand occurred on Örö Island, covering ca 2500 m2 before its eradication, and the median size of all stands was 6 m2. Five of the six largest stands were on sandy beach, but stony shore was the most common habitat type.

Distribution and impact of invasive alien plant species in Bardia National Park, western Nepal

2020 ◽  
Vol 47 (3) ◽  
pp. 197-205
Author(s):  
Suneeta Bhatta ◽  
Laxmi Raj Joshi ◽  
Bharat Babu Shrestha
Keyword(s):  
Species Richness ◽  
Protected Areas ◽  
Plant Species ◽  
National Park ◽  
Lantana Camara ◽  
Native Plant ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Widespread Species ◽  
Invasive Alien Plant

SummaryInvasive alien plant species (IAPS) are spreading into protected areas worldwide; however, knowledge of these invasions and their impacts in Nepal’s protected areas is poor. Here, the spatial distribution pattern of IAPS in Bardia National Park (BNP), Nepal, was analysed using roadside surveys and grid sampling. The impacts of the most abundant IAPS, Lantana camara, on plant communities were analysed by comparing 60 pairs of non-invaded and invaded quadrats. Twelve IAPS, including two of the most prolific species globally, L. camara and Chromolaena odorata, were recorded from BNP. The Karnali floodplain in the south-western region of the park, a prime habitat of one-horned rhinoceros, was highly invaded by the IAPS. Tree canopy and distance to road, river and settlement were the major factors affecting IAPS occurrence. Lantana camara modified plant community structure and significantly reduced plant species richness and diversity; species richness of native plants was reduced to less than half in invaded plots. Plant invasions and impacts on native plant diversity have been increasing in BNP. We recommend management interventions involving immediate eradication of C. odorata and other species with single satellite populations and control measures for other widespread species such as L. camara and Ageratum houstonianum.

scholarly journals Status and impacts of invasive alien plant species in Parsa National Park, central Nepal

2020 ◽  
Vol 30 (1) ◽  
pp. 21-31 ◽  
Author(s):  
R. Chaudhary ◽  
B. B. Shrestha ◽  
H. Thapa ◽  
M. Siwakoti
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
National Parks ◽  
National Park ◽  
Invasive Alien Species ◽  
Plant Invasions ◽  
Tree Regeneration ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Invasive Alien Plant

Extent of plant invasions has been expected to be low in protected areas such as national parks due to low anthropogenic activities and high wilderness. However, recent researches across the world have revealed that plant invasions can be severe in the national parks with negative impacts on the protected species and ecosystems. Unfortunately, the status of plant invasions in the national parks of Nepal is mostly unknown. In this study, we sampled at seven locations inside the Parsa National Park (PNP) to document diversity and abundance of invasive alien plant species (IAPS) and their impacts on tree regeneration. Altogether, 130 quadrats of 10 m × 10 m were sampled. We recorded 14 IAPS in the PNP. Three of the IAPS (Chromolana odorata, Lantana camara and Mikania micrantha) were among the 100 of the world’s worst invasive alien species. C. odorata was found to be the most frequent IAPS with the highest cover. The frequency and cover of the IAPS were higher at the sites close to the settlements than at the sites away from the settlements. The species richness of the IAPS was also higher at the sites closer to the settlements than away. The sapling density of the tree species was found to have declined with the increasing cover of the IAPS suggesting that the IAPS had negatively affected tree regeneration. Our data revealed that the PNP has already witnessed massive plant invasions with widespread occurrence of three of the world’s worst invasive species. Therefore, it is high time to integrate management of invasive alien species in the management plan of the park.

scholarly journals Avian Community Structure as a Function of Season, Habitat Type, and Disturbance, in Mole National Park, Northern Region (Ghana)

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Collins Ayine Nsor ◽  
Emmanuel Acquah ◽  
Grace Mensah ◽  
Vincent Kusi-Kyei ◽  
Samuel Boadi
Keyword(s):  
Habitat Preference ◽  
National Park ◽  
Habitat Preferences ◽  
Habitat Type ◽  
Northern Region ◽  
Point Count ◽  
Ordination Techniques ◽  
Bird Habitat ◽  
High Conservation ◽  
Conservation Concern

The study assessed factors that influenced bird-habitat preference, diversity, and spatial distribution in Mole National Park. Birds were identified using point count sampling method, while ordination techniques were performed to determine the influence of environmental factors on bird-habitat preference. A total of 4951 individuals belonging to 131 species were identified across the four habitat types in the wet (n= 3033) and dry (n= 1648) seasons. Despite the high abundance and richness of birds in the woodland and shrubland habitats, grassland habitat was the most diverse, due to the high spatial evenness distribution of the birds. Bushfire, patchiness, and animal trampling were the key environmental determinants in bird assemblages and habitat preferences and accounted for 62.02% and 81.82% variations in the two seasons. Rarer birds like White-Backed Vulture (NT) and White-Headed Vulture (CR), Bateleur Eagle (NT), and Woolly-Necked Stork (VU), with high conservation concern, suggest intensification of conservation effort, while the dominance of Sahel Bush-sparrow was probably due to their broad range habitat preferences and ability to adapt to environmental conditions across these habitats. These species could be used as indicators of habitat quality, if future scenarios restrict their movement or distribution in narrow range habitats.

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.

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