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Some understory IAS in Sempu Island Notes: A. Chromolaena odorata; B. Stachytarpheta jamaicensis; C. Lantana camara; D. Synedrella nodiflora; E. Chyanthillium cinereum; F. Spathodea campanulata; G. Imperata cylindrica and H. passiflora foetida.
Source publication
As indicator for environmental disturbances, the understory is an important structural and functional component of forests ecosystems. Hence, this study was conducted to investigate the diversity and composition of understory plants in the lowland forests adjacent to the trekking paths along Semut Bay (dock entrance) to Segara Anakan Lagoon and som...
Contexts in source publication
Context 1
... understory IAS were found in the study area of Sempu Island. Of the twelve, five were shrubs, five were grasses, one was a tree seedling and one liana (Table 3, Fig. 4). Forest integrity in the lowland forests of Sempu Island was considered higher than that in the coastal areas. Most of the understory IAS were found more abundantly in the coastal areas than in the lowland forest. Hence, coastal areas in Sempu Island experienced more disturbances than the lowland forest. Monitoring and management of ...
Context 2
... coastal areas in Sempu Island experienced more disturbances than the lowland forest. Monitoring and management of these understory IAS is recommended, particularly at the sampling sites where they are already present. The only IAS that occured in the lowland forest adjacent to Semut Path was tree seedlings of Spathodea campanulata (Table 3, Fig. 4 F). It was particularly found at Semut Path I. Thus, Semut Path I was considered more disturbed than Semut Path II. This species grew well at the lowland forest of Semut Path and was not found in any of the coastal areas since it favors moist habitats and grows best in sheltered tropical areas (ISSG 2018). Furthermore, an S. campanulata ...
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Citations
... We choose the sampling locations representing three types of agroforests in the area. The size of quadrats and sampling area were determined by following previous research by Hutchinson et al. (1999) and Hapsari et al. (2020). For each hamlet, we placed one quadrat for each type of agroforest. ...
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... Recent studies revealed that a small protected island in Indonesia, known as Sempu Island Nature Reserve, is currently encountering the spread of invasive alien plant species (Rindyastuti et al. 2018a;Hapsari et al. 2020). The Sempu Island, with an area of 877 ha, is located in the southern part of Java Island and is governed by the regional administration of Malang Regency, East Java Province, Indonesia. ...
... Small seeds (dry weight <2 mg) are predicted to influence plant invasiveness not only in the understory but also in woody invaders (Rejmánek 1996). Thus, small seeds have many benefits over large seeds that facilitate their invasiveness, resulting in large populations and rapid colonization, especially in disturbed habitats (Rejmánek and Richardson 1996), such as in Sempu Island, especially its coastal areas (Hapsari et al. 2020). ...
... The selected species both invasive and native species have been inventoried in the previous study by Rindyastuti et al. 2018b). The occurrence of plant invasiveness was also analyzed ecologically (Hapsari et al. 2020). Therefore, plant species was selected based on plant abundance and ecological information about the invasiveness. ...
Background
To address the lack of evidence supporting invasion by three invasive plant species ( Imperata cylindrica, Lantana camara, and Chromolaena odorata ) in tropical ecosystems, we compared the ecophysiological and leaf anatomical traits of these three invasive alien species with those of species native to Sempu Island, Indonesia. Data on four plant traits were obtained from the TRY Plant Trait Database, and leaf anatomical traits were measured using transverse leaf sections.
Results
Two ecophysiological traits including specific leaf area (SLA) and seed dry weight showed significant association with plant invasion in the Sempu Island Nature Reserve. Invasive species showed higher SLA and lower seed dry weight than non-invasive species. Moreover, invasive species showed superior leaf anatomical traits including sclerenchymatous tissue thickness, vascular bundle area, chlorophyll content, and bundle sheath area. Principal component analysis (PCA) showed that leaf anatomical traits strongly influenced with cumulative variances (100% in grass and 88.92% in shrubs), where I. cylindrica and C. odorata outperformed non-invasive species in these traits.
Conclusions
These data suggest that the traits studied are important for plant invasiveness since ecophysiological traits influence of light capture, plant growth, and reproduction while leaf anatomical traits affect herbivory, photosynthetic assimilate transport, and photosynthetic activity.
