Fundamentals of Ecology

Hd, Jung; Odum, Eurene P.

doi:10.2307/1530838

Cited by 27 publications

(4 citation statements)

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“…Where ni= number of the individuals per species; N= total number of individuals per species. The dominance index Index values range from 0 -1 by the following categories: if 0<C<0.5, the dominance is low, if 0,5<C0.75, the level of dominance is moderate, and if 0.75<C1,0, the level of dominance is high [16].…”

Section: Figure 1 Map Of Sampling Station In Karimunjawa Islandmentioning

confidence: 99%

“…Results of the diversity index (H'), dominance index (C), and Evenness index (E), respectively, can be seen in Figure 3, Figure 4, and Figure 5. Based on the Shannon-Wiener diversity index (H'), The highest value of diversity index (H') was in the second sampling time in aquaculture area with the value of 2.40 categorized as medium [16]. While the lowest was in the first sampling time in mangrove area with the value of 1.36, mangrove area have a diversity value range of 1.17-1.63 indicating low-medium diversity, based on [16] category.…”

Section: Diversity Index Evenness Index and Dominance Indexmentioning

confidence: 99%

“…Based on the Shannon-Wiener diversity index (H'), The highest value of diversity index (H') was in the second sampling time in aquaculture area with the value of 2.40 categorized as medium [16]. While the lowest was in the first sampling time in mangrove area with the value of 1.36, mangrove area have a diversity value range of 1.17-1.63 indicating low-medium diversity, based on [16] category. The Aquaculture area has a higher H' index value than the Mangrove area.…”

Section: Diversity Index Evenness Index and Dominance Indexmentioning

confidence: 99%

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The Roles of Macrobenthic Molluscs Structure in Assessing Ecological Status at Mangrove and Aquaculture Areas

P. Putro,

Anarizta,

Muhammad

et al. 2023

Jurnal Teknologi

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stability of Coastal water ecosystem could have an effect on mangrove vegetation and anthrophogenic activities. This stability correlates significantly with the structure of the macrobenthic mollusk community in the area, some of this biota are bioindicator agents. This study aims to assess the ecological functions of macrobenthic molluscs, evaluate the spatial and temporal differences in their community structure, and analyze their correlation to environmental parameters in aquaculture and mangrove areas in the Karimunjawa Islands, Jepara, Central Java, Indonesia. Purposive random sampling method was conducted at KJABB-IMTA aquaculture and mangrove areas between July and September 2021. Collected data were analyzed using k-dominance curve, NMDS ordination, PCA, and BIO-ENV using Primer 6.1.5 software. Based on Paired T Test result, comparison between each location showed significant difference (t=15.916, P<0.05, dF=5) meanwhile comparison between each sampling period showed insignificant result. The highest abundance and diversity were found in the aquaculture area and dominated by gastropods. Significant differences occurred in the structure of macrobenthic molluscs between the two study locations (t=15.916, P<0.05, df=5), while the comparison between their composition and abundance between sampling times was not significant. The abiotic elements that primarily impact the structure of macrobenthic mollusks are the particle size composition of the substrate (mud) and dissolved oxygen (DO) based on PCA and BIO-ENV analysis (BIO-ENV; r=0.733).

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Section: Figure 1 Map Of Sampling Station In Karimunjawa Islandmentioning

confidence: 99%

Section: Diversity Index Evenness Index and Dominance Indexmentioning

confidence: 99%

Section: Diversity Index Evenness Index and Dominance Indexmentioning

confidence: 99%

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The Roles of Macrobenthic Molluscs Structure in Assessing Ecological Status at Mangrove and Aquaculture Areas

P. Putro,

Anarizta,

Muhammad

et al. 2023

Jurnal Teknologi

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“…The Earth surface is replete with ecosystems that are quasiclosed to material exchange, but open to light energy, e.g., lakes, microbial mats, and open ocean gyres [1][2][3]. Indeed nearly the entirety of Earth's fossil record before plants and animals is composed of stromatolites-the mineral residues left over millennia from the activities of stratified microbial communities [4].…”

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confidence: 99%

Closed ecosystems extract energy through self-organized nutrient cycles

Goyal

Flamholz

Petroff

et al. 2023

Preprint

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Our planet is roughly closed to matter, but open to energy input from the sun. However, to harness this energy, organisms must transform matter from one chemical (redox) state to another. For example, photosynthetic organisms can capture light energy by carrying out a pair of electron donor and acceptor transformations (e.g., water to oxygen, CO2 to organic carbon). Closure of ecosystems to matter requires that all such transformations are ultimately balanced, i.e., other organisms must carry out corresponding reverse transformations, resulting in cycles that are coupled to each other. A sustainable closed ecosystem thus requires self-organized cycles of matter, in which every transformation has sufficient thermodynamic favorability to maintain an adequate number of organisms carrying out that process. Here, we propose a new conceptual model that explains the self-organization and emergent features of closed ecosystems. We study this model with varying levels of metabolic diversity and energy input, finding that several thermodynamic features converge across ecosystems. Specifically, irrespective of their species composition, large and metabolically diverse communities self-organize to extract roughly 10% of the maximum extractable energy, or ~100 fold more than randomized communities. Moreover, distinct communities implement energy extraction in convergent ways, as indicated by strongly correlated fluxes through nutrient cycles. As the driving force from light increases, however, these features --- fluxes and total energy extraction --- become more variable across communities, indicating that energy limitation imposes tight thermodynamic constraints on collective metabolism.

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Respiratorischer Kohlenstoffverbrauch Alpiner Zwergstrauchbestände

Huber¹

1976

Verhandlungen Der Gesellschaft Für Ökologie Wien 1975

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Fundamentals of Ecology

Cited by 27 publications

References 0 publications

The Roles of Macrobenthic Molluscs Structure in Assessing Ecological Status at Mangrove and Aquaculture Areas

The Roles of Macrobenthic Molluscs Structure in Assessing Ecological Status at Mangrove and Aquaculture Areas

Closed ecosystems extract energy through self-organized nutrient cycles

Respiratorischer Kohlenstoffverbrauch Alpiner Zwergstrauchbestände

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