PROJECT 2

Project 2 - Restored & Natural Sites

Tiwoho & Bangka Island, North Sulawesi, Indonesia

Experimental Design

Two Sites

Tiwoho - Restored Field Site
Bangka Island - Natural Field Site

Each Transect = Approx. 6 Quadrates

Each Quadrat = 3 Sub-Quadrats

Quadrats were set-up 20 meters in between one another on opposite sides of transect line, starting on the right side

Transects started perpendicular to ocean and moved straight into the mangrove forest until land
The transects were layed out parellel to one another
The number of transects and number of quadrats in each transect depended on the size of the field site

Diagram of Transect Set-Up

Diagram of Quadrat Set-Up

Photo Credited to Zoë Shribman

Table of Tree Growth Identification

Used to Determine Measurement of Trees in Sub-Quadrats

Identification of Measurement Categories in each Sub-Quadrat

Diagram Credited to Zoë Shribman

Data Analysis

Background

The AEI Indonesia team, along with volunteers from Blue Forests and Suara Pulau, measured the DBH (Diamter at Breast Height) and took account of the Genus Species of two mangrove forest sites: Tiwoho & Bangka Island. The mangrove forest next to Tiwoho village was a restored site and the mangrove forests measured on Bangka Island were natural. The motivation for this data sampling was to accumulate data to showcase the similarities and differences between a restored and a natural forest site. The data collected can be used to analyze a number of different variables, including species density patterns, forest growth rates, etc. The NGO Blue Forests and the Suara Pulau Foundation played a huge role in helping to make this data sampling possible.

Photo Credited to Felicia Edström

Photos Credited to Felicia Edström, Anna-Sophie Hoppe, Felicia Edström, Ulva & Owen Tap, Felicia Edström, Felicia Edström, Zoë Shribman, Felicia Edström, Zoë Shribman, Felicia Edström, Felicia Edström, Anna-Sophie Hoppe

The following diagram shows a number of the species of mangroves that were found between the Tiwoho and Bankga field sites. The diagram has both the local and biological names listed.

Diagram Credited to Zoë Shribman

On Bangka, four sites on the island were sampled. Sites 3 and 4 were closer to Lihunu village and Sites 1 and 2 were further away from the village.

The table shows the average circumferences for all four sites. From the data sampled, Sites 1 and 2 have adult mangrove trees with larger trunk circumferences. Sites 3 and 4 had smaller sized trees.

While the data presented in this table is generalized information, it signifies the main difference between the Tiwoho and Bangka field sites: Restored vs. Natural.

In general, the trunk circumferences of the majority of adult mangroves were larger on Bangka Island than in Tiwowo.

While this is a valid observation, it is important to take into account the differences between species as well.

Note: The following data anlaysis was processed and presented during the trip in Indonesia. It is apart of a larger, working data collection for multiple projects, including Dr. Jeannine Lessmann's records and Zoë Shribman's Senior Thesis at Eckerd College. Further analysis of this sampling will occur through these projects.

Project 2

Project 2 - Restored & Natural Sites

Tiwoho & Bangka Island, North Sulawesi, Indonesia

Experimental Design

Two Sites

Tiwoho - Restored Field Site

Bangka Island - Natural Field Site

Each Transect = Approx. 6 Quadrates

Each Quadrat = 3 Sub-Quadrats

​

Quadrats were set-up 20 meters in between one another on opposite sides of transect line, starting on the right side

Transects started perpendicular to ocean and moved straight into the mangrove forest until land

The transects were layed out parellel to one another

The number of transects and number of quadrats in each transect depended on the size of the field site

Diagram of Transect Set-Up

Diagram of Quadrat Set-Up

Photo Credited to Zoë Shribman

Table of Tree Growth Identification

Used to Determine Measurement of Trees in Sub-Quadrats

Identification of Measurement Categories in each Sub-Quadrat

Diagram Credited to Zoë Shribman

Data Analysis

Background

Photo Credited to Felicia Edström

Photos Credited to Felicia Edström, Anna-Sophie Hoppe, Felicia Edström, Ulva & Owen Tap, Felicia Edström, Felicia Edström, Zoë Shribman, Felicia Edström, Zoë Shribman, Felicia Edström, Felicia Edström, Anna-Sophie Hoppe

The following diagram shows a number of the species of mangroves that were found between the Tiwoho and Bankga field sites. The diagram has both the local and biological names listed.

Diagram Credited to Zoë Shribman

On Bangka, four sites on the island were sampled. Sites 3 and 4 were closer to Lihunu village and Sites 1 and 2 were further away from the village.

​

The table shows the average circumferences for all four sites. From the data sampled, Sites 1 and 2 have adult mangrove trees with larger trunk circumferences. Sites 3 and 4 had smaller sized trees.

While the data presented in this table is generalized information, it signifies the main difference between the Tiwoho and Bangka field sites: Restored vs. Natural.

In general, the trunk circumferences of the majority of adult mangroves were larger on Bangka Island than in Tiwowo.

While this is a valid observation, it is important to take into account the differences between species as well.

Species Found

Average Circumference for Bangka & Tiwoho Field Sites

Average Circumferences of Bankga Field Sites

Table Credited to Zoë Shribman

Translations by Anna-Sophie Hoppe

Table Credited to Zoë Shribman

Translations by Anna-Sophie Hoppe

Table Credited to Zoë Shribman

Translations by Anna-Sophie Hoppe

This table showcases the differences in average circumferences between two different genus species at the Bangka and Tiwoho sites.

On average, both mangrove species have larger circumferences at the Bangka sites than in Tiwoho.