Project 1




Project 1 - Tambak Seedling Measurements
Tapak Village in Semarang, Central Java, Indonesia
Background
The 2015 AEI Indonesia group planted nearly 600 young mangroves in the Tambaks, or fish ponds, near Tapak Village. With the help of UNIKA faculty and students along with NGO Prenjak, the 2016 AEI Indonesia group returned to this site, in order to measure and assess the outcomes after one year.
Prenjak, a local NGO in Tapak Village, connected us with various community members in Tapak Village to discuss their lives and how they relate to the natural environment. We chiefly wanted to understand if they had observed environmental change during their lifetime, if they had participated in conservation efforts, how they interact and use their environment and how they felt about growing tourism in their village. For over an hour that day, we had a conversation with these community members facilitated by the generous help of UNIKA students and professors.
By beginning by talking about family and their childhood we were able to glean some understanding of the environmental history of the area. One fisherman reported that when he was growing up they shrimp yields were very high and along with caring for his specific fish pond, it was profitable to harvest shrimp. Today, he reported it was not worth the effort. Additionally, some community members spoke of the community action taken to prevent factory waste from entering their fishponds. The issue was that, before they took action, upland rainfall would collect waste from the factory and turn the water black. If this water flooded into the fishponds, many fish would die. They wrote a letter asking for greater regulation of the factory waste but it is an ongoing and complex issue. Other things we learned about were how they plant mangrove seedlings and about cuisine using the fruit of Avicennia marina.
It was a pleasure to have these in depth conversations with community members. It emphasized the human aspect of environmentalism and the importance of understanding the role of local communities in achieving environmental goals.
Experimental Design

AEI Indonesia & UNIKA team
Tambak field site near Tapak Village
Photo Credited to Zoë Shribman
The experimental design was initially set up in 2015, in order to assess a number of variables, including growth conditions and species density
Details:
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Duration: June 2015 - June 2016
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Replicates: 5 Tambaks (Fish Ponds)
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Subsample: 5 Seedlings
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90 Seedlings per Tambak
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450 Seedlings Planted Total
Manipulated Variables:
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Three Densities: 0.5 m, 1.0 m & 2.0 m apart
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Three Elevations: Low, Middle & High
Two species:
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Avicennia marina
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Rhizophora mucronata
The change in both height and width of the seedlings were measured, in order to assess the change after one year.
Oral History
Data Analysis


Data Results for Avicennia marina

These results imply that due to the harsh conditions of the fish pond environment and the large number of variables affecting the growth of the two species, there was a very low survivorship rate for both species. The Avicennia marina species had a higher survivorship than the Rhizophora mucronata. For the Avicennia marina, the high elevation and the density of 1.0 m had the largest growth rates.
While the analysis and findings of this project are not finalized yet, this data allows for concrete documentation of the villagers and fishermen's observations. It is difficult to grow mangrove seedlings in the fish ponds successfully and efficiently, which is backed up buy the measurements taken and observations noted. The publication of this data in the future will hopefully help to control the development of infrastructure and the negative effects of an industrial surrounding, by increasing the awareness of this specific environmental initiative.
Rhizophora mucronata seedling
Tambak field site near Tapak Village
Photo Credited to Zoë Shribman


Photo Credited to Zoë Shribman
Left to Right: Victoria Seligman, Pak Pardi,
Hubertus Vega
Tambak field site near Tapak Village

Photo Credited to Zoë Shribman
Left to Right: Aidan Browne, Irfan Setyadji, Pak Yuli
Tambak field site near Tapak Village
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Photo Credited to Zoë Shribman
Left to Right: Bu Inneke, Anna-Sophie Hoppe, Pak Jumari
Tambak field site near Tapak Village
