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Climate Change Impacts on Coastal Ecosystems Listiawati, Vina
Proceeding of International Conference on Biology Education, Natural Science, and Technology 2024: Proceeding of International Conference on Biology Education, Natural Science, and Technology
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Coastal ecosystems such as seagrass beds and coral reefs are unique habitats at the interface between terrestrial and oceanic environments. Such ecosystems are among the most productive and dynamic ecosystems, which are highly sensitive to climate change including ocean warming and acidification. Calcifiers such as corals and sea urchins are suggested to be negatively affected by ocean warming and acidification. Meanwhile, macrophytes such as seagrasses and seaweeds are suggested to be positively affected by ocean warming and acidification, as the increase in temperature and CO2 concentration in seawater can potentially increase their photosynthetic rates and productivity. Here, some recent studies are introduced to explore how ocean warming and acidification affect calcifiers and macrophytes by conducting interaction studies. Ocean warming and acidification were negatively affected coral growth rate and sea urchin physiology, while photosynthesis and growth of seagrasses and seaweeds were particularly increased under ocean warming and acidification, thus potentially alleviating the negative effects of ocean warming and acidification. However, they do not always provide habitat refugia for calcifiers. Ocean warming and acidification are also suggested to modify the trophic interactions in coastal ecosystems. The present studies showed that ocean warming and acidification have the potential to shift the balance in coastal ecosystems and assessing the organism interactions is important to give a better understanding of the response of coastal ecosystems to climate change.
Rhizosphere Bacteria Plumeria acuminata Increases Growth of Zea mays After Root Inoculation Insani, Qori Tsaniyah Ainun; Rahayu, Triastuti; Widianto, Donny; Listiawati, Vina; Mumpuni, Kistantia Elok; Prayitno, Trio Ageng; Sidiq*, Yasir
Jurnal IPA & Pembelajaran IPA Vol 7, No 4 (2023): DECEMBER 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v7i4.34658

Abstract

The bacteria found in the rhizosphere are called plant growth promoting rhizobacteria (PGPR), namely bacteria that can stimulate plant growth by producing growth hormones, one of which is the hormone indole acetic acid (IAA) which plays a role in regulating plant growth and development. Five isolates of rhizosphere bacteria were isolated on frangipani roots (P26, P31, P36, P37 and P38). Previous research showed that five bacterial isolates were capable of producing the hormone IAA. However, evidence of its potential as a PGPR has not been obtained. Therefore, the aim of this study was to test the effect of inoculation of rhizosphere bacteria on maize plants. The research method uses a quantitative experimental method, namely 15 repetitions for each treatment. Data collection was carried out 1 day after planting (HTS) until the 14th day. Data were analyzed using a 95% confidence student t-test or with a significance level of 5% (a=0.05). This inoculation begins with germinating maize seeds and observing the roots. The germinated maize seeds are then soaked in the bacterial suspension for one hour at room temperature. The results showed that inoculation with isolates P36, P37 and P38 significantly increased the height of maize plants, while isolate P37 significantly increased the number of leaves and root length of corn plants, isolate P38 could significantly increase the number of roots of corn plants.Thus, these results support the evidence that rhizosphere bacteria from frangipani have an effect on increasing the growth of maize plants
The Percentage of Epiphytes Cover on The Seagrass Beds in Sepanjang Beach, Indonesia Listiawati, Vina; Rohmah, Siti Naily; Alfan, Dheny Choirul
Bioeksperimen: Jurnal Penelitian Biologi Vol 4, No 2: September 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v4i2.6889

Abstract

Seagrasses are foundation plant species as they not only create their own habitat but also for other marine organisms. In estuarine and marine environments, they form beds and their leafy structure are the excellent substrate for the epiphytes. In this study, we aimed to investigate the percentage cover of epiphytes on the seagrass beds in Sepanjang Beach, Indonesia. 5 transect lines with 20 m in length with the 50 x 50 cm quadrat at the interval of 5 m were placed at the perpendicular angle to the shoreline. These transects were positioned from the furthermost of the western part to the middle part of the beach, represented the gradation level of human activities. The result showed that the percentage cover of epiphytes was significantly higher on the middle part of the beach compared to the side of the beach. This present study suggest that human activities could lead to the increasing of epiphytes cover on the seagrass beds.
A Diversity of Copepods in Gajah Mungkur in Wonogiri Regency, Central Java, Indonesia Roziaty, Efri; Arianto, Afrika; Listiawati, Vina
Bioeksperimen: Jurnal Penelitian Biologi Vol 9, No 2: September 2023
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v9i2.23143

Abstract

GajahMungkur Reservoir is a freshwater ecosystem thatis located6kmsouthofWonogiri Regency,CentralJavaProvince. Zooplankton is the primary consumer in the food chain of aquatic ecosystems. One of the common zooplankton found in freshwater ecosystem is copepod. Copepod is sensitive organism and play an important role as bioindicatator of water quality. The aimed of this study was to investigate the copepods diversity in Gajah Mungkur Reservoir. The method applied to this study is exploration and application of purposive sampling techniques in sampling.  Copepods were collected from three different station, namely Station 1 (fishing area), Station 2 (tourism area), and Station 3 (fish cage area or keramba). The abiotic parameters were found to be varied on each station. Results showed that Gajah Mungkur Reservoir has moderately diverse copepods species with the average of diversity index 1.21. There were 7 species of copepods found in Gajah Mungkur Reservoir which mostly dominated by Mesocyclops sp., especially in Station 1 (fishing area). Meanwhile Microcyclops sp. was only found in Station 3 (fish cage area or keramba), suggesting that this species has a potential as bioindicator in Gajah Mungkur Reservoir. This study suggest that changes in physicochemical parameters might influence the diversity and abundance of copepod in Gajah Mungkur Reservoir.