Abstract
Abstract Rubroshorea curtisii (Meranti Seraya) is a species in the Dipterocarpaceae family that is of ecological and economic signi8icance. The distribution of these species in Indonesia has been reported only in Sumatra, Singkep, and Lingga, and it is currently found in Batam Island, Riau Archipelago, Indonesia. The pressure of development on Batam has caused the forest to be fragmented into smaller parts and signi8icantly reduced the natural habitat of Rubroshorea curtisii . The objective of this research was to assess the synecology of Rubroshorea curtisii species to determine whether the fragmented forest landscape in Batam is an important biodiversity patch for Rubroshorea curtisii by analyzing its structure, composition, and abundance in the Sei Harapan and Bukit Tiban fragmented forests. The study used a vegetation analysis approach employing purposive sampling in 12 circular plots for each site where Rubroshorea curtisii grew naturally. In the Sei Harapan Fragmented Forest, the Important Value Index for the species was 138.01% (tree), 46.48% (pole), 23.38% (sapling), and 27.12% (seedling), while in the Bukit Tiban fragmented forest was 121.79% (tree), 26.67% (sapling), and 30.31% (seedling). At the pole stage, Calophyllum inophylloide had the highest Important Value Index (22.62%). Regarding the diversity index, all growth stages were considered high and medium, with 3,12 (seedling), 3.37 (sapling), 2.91 (pole), and 2,09 (tree) in the Sei Harapan fragmented forest, and 3,12 (seedling), 3.45 (sapling), and 3,44 (pole), 2.33 (tree). The evenness index is all categorized as high, with 0.94 (seedling), 0.94 (sapling), 0.93 (pole), and 0.72 (tree) in Sei Harapan fragmented forest and also categorized as high in Bukit Tiban fragmented forest with 0.91 (seedling), 0.93 (sapling), 0.94 (pole), and 0.72 (tree). The species richness index in the Sei Harapan fragmented forest is classi8ied as high with 6.62 (seedling), 8.06 (sapling), and 5.78 (pole), but at the tree level, it is classi8ied as medium with a value of 4.10. In the Bukit Tiban area, all life stages are categorized as having a high level of species richness, with 6.42 (seedling), 9.26 (sapling), 8.67 (pole), and 5.37 (tree). The study revealed that the fragmented forest on the highly industrialized island of Batam serves as a forest pocket that preserves valuable tropical biodiversity.
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Claims 11
Claim · model-written summary
Rubroshorea curtisii had stage-specific Important Value Indices in Sei Harapan.
- Taxon
- Rubroshorea curtisii
Rubroshorea curtisiit0 - Organ / stage
- treee0
- Outcome
- Important Value Indexe0
- Value
- 138.01%e0
- Setting
- Sei Harapan Fragmented Foreste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the Sei Harapan Fragmented Forest, the Important Value Index for the species was 138.01% (tree), 46.48% (pole), 23.38% (sapling), and 27.12% (seedling)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Rubroshorea curtisii had a pole Important Value Index of 46.48% in Sei Harapan.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Organ / stage
- polee0
- Outcome
- polee0
- Value
- 46.48%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“46.48% (pole)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Rubroshorea curtisii had a sapling Important Value Index of 23.38% in Sei Harapan.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Organ / stage
- saplinge0
- Outcome
- saplinge0
- Value
- 23.38%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“23.38% (sapling)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Rubroshorea curtisii had a seedling Important Value Index of 27.12% in Sei Harapan.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Organ / stage
- seedlinge0
- Outcome
- seedlinge0
- Value
- 27.12%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“27.12% (seedling)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Rubroshorea curtisii had tree, sapling and seedling Important Value Indices of 121.79%, 26.67% and 30.31% in Bukit Tiban.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- Important Value Indexe1
- Value
- 121.79%e0
- Setting
- Bukit Tiban fragmented foreste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the Bukit Tiban fragmented forest was 121.79% (tree), 26.67% (sapling), and 30.31% (seedling)”
e1“the Important Value Index for the species”
t0“Rubroshorea curtisii”
Claim · model-written summary
Calophyllum inophylloide had the highest pole-stage Important Value Index of 22.62%.
Verbatim
e0“At the pole stage, Calophyllum inophylloide had the highest Important Value Index (22.62%)”
Claim · model-written summary
Diversity indices were high or medium across growth stages in the two fragmented forests.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- diversity indexe0
- Direction
- high and mediume0
- Setting
- Sei Harapan fragmented foreste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regarding the diversity index, all growth stages were considered high and medium, with 3,12 (seedling), 3.37 (sapling), 2.91 (pole), and 2,09 (tree) in the Sei Harapan fragmented forest, and 3,12 (seedling), 3.45 (sapling), and 3,44 (pole), 2.33 (tree)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Evenness was categorized as high in both forests across growth stages.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- evenness indexe0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The evenness index is all categorized as high, with 0.94 (seedling), 0.94 (sapling), 0.93 (pole), and 0.72 (tree) in Sei Harapan fragmented forest and also categorized as high in Bukit Tiban fragmented forest with 0.91 (seedling), 0.93 (sapling), 0.94 (pole), and 0.72 (tree)”
t0“Rubroshorea curtisii”
Claim · model-written summary
Species richness was high at seedling, sapling and pole stages but medium at tree stage in Sei Harapan.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- species richness indexe0
- Direction
- highe0
- Setting
- Sei Harapan fragmented foreste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The species richness index in the Sei Harapan fragmented forest is classi8ied as high with 6.62 (seedling), 8.06 (sapling), and 5.78 (pole), but at the tree level, it is classi8ied as medium with a value of 4.10”
t0“Rubroshorea curtisii”
Claim · model-written summary
Species richness was high across life stages in Bukit Tiban.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- species richnesse0
- Direction
- highe0
- Setting
- Bukit Tiban areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the Bukit Tiban area, all life stages are categorized as having a high level of species richness, with 6.42 (seedling), 9.26 (sapling), 8.67 (pole), and 5.37 (tree)”
t0“Rubroshorea curtisii”
Claim · model-written summary
The fragmented forest on Batam preserves tropical biodiversity.
- Taxon
- Rubroshorea curtisiiRubroshorea curtisiit0
- Outcome
- preserves valuable tropical biodiversitye0
- Setting
- Batame0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fragmented forest on the highly industrialized island of Batam serves as a forest pocket that preserves valuable tropical biodiversity”
t0“Rubroshorea curtisii”