scholarly journals Sediment properties and CO<sub>2</sub> efflux from intact and cleared temperate mangrove forests

2015 ◽  
Vol 12 (20) ◽  
pp. 6169-6180 ◽  
Author(s):  
R. H. Bulmer ◽  
C. J. Lundquist ◽  
L. Schwendenmann
Keyword(s):  
New Zealand ◽  
Mangrove Forest ◽  
Abiotic Factors ◽  
Co2 Uptake ◽  
Co2 Efflux ◽  
Mangrove Forests ◽  
Sediment Grain Size ◽  
Significant Difference ◽  
Main Factors ◽  
The Impact

Abstract. Temperate mangrove forests in New Zealand have increased in area over recent decades. Expansion of temperate mangroves in New Zealand is associated with perceived loss of other estuarine habitats, and decreased recreational and amenity values, resulting in clearing of mangrove forests. In the tropics, changes in sediment characteristics and carbon efflux have been reported following mangrove clearance. This is the first study in temperate mangrove (Avicennia marina) forests investigating the impact of clearing on sediment CO2 efflux and associated biotic and abiotic factors. Sediment CO2 efflux rates from intact (168.5 ± 45.8 mmol m−2 d−1) and cleared (133.9 ± 37.2 mmol m−2 d−1) mangrove forests in New Zealand are comparable to rates measured in tropical mangrove forests. We did not find a significant difference in sediment CO2 efflux rates between intact and cleared temperate mangrove forests. Pre-shading the sediment for more than 30 min prior to dark chamber measurements was found to have no significant effect on sediment CO2 efflux. This suggests that the continuation of photosynthetic CO2 uptake by biofilm communities was not occurring after placement of dark chambers. Rather, above-ground mangrove biomass, sediment temperature and chlorophyll a concentration were the main factors explaining the variability in sediment CO2 efflux in intact mangrove forests. The main factors influencing sediment CO2 efflux in cleared mangrove forest sites were sediment organic carbon concentration, nitrogen concentration and sediment grain size. Our results show that greater consideration should be given regarding the rate of carbon released from mangrove forest following clearance and the relative contribution to global carbon emissions.

scholarly journals Sediment CO<sub>2</sub> efflux from cleared and intact temperate mangroves and tidal flats

2015 ◽  
Vol 12 (4) ◽  
pp. 3547-3576
Author(s):  
R. H. Bulmer ◽  
L. Schwendenmann ◽  
C. J. Lundquist
Keyword(s):  
Co2 Emissions ◽  
Carbon Sink ◽  
Abiotic Factors ◽  
Nitrogen Concentration ◽  
Tidal Flats ◽  
Mangrove Sediment ◽  
Co2 Efflux ◽  
Mangrove Forests ◽  
Similar Time ◽  
The Impact

Abstract. Temperate mangroves in Southern Australia and New Zealand have been increasing in area over the past 50 years, whereas tropical mangroves have declined by 30–50% over a similar time frame. Tropical mangroves are understood to be an important carbon sink and carbon dioxide (CO2) emissions following clearance are estimated to be comparable or greater than CO2 emissions following the clearance of many terrestrial forest systems. Recreational and amenity values or perceived loss of other estuarine habitats due to expanding temperate mangrove forests have resulted in clearing of temperate mangroves. In this study, we investigated the impact of temperate mangrove clearance on CO2 efflux from the sediment to the atmosphere along with a range of other biotic and abiotic factors. Significantly higher CO2 efflux rates were measured in cleared (1.34 ± 0.46 μmol m2 s-1) and intact mangrove sites (2.31 ± 0.72 μmol m2 s-1) than in tidal flats (-0.23 ± 0.27 μmol m2 s-1). Site and sediment characteristics such as sediment carbon and nitrogen concentration, chlorophyll α concentration, grain size, mangrove height, macrofaunal abundance, sediment temperature and moisture were strongly correlated with sediment CO2 efflux. Our results suggest that carbon stored within temperate mangrove sediment is released over a period of years to decades after mangrove clearance. CO2 efflux from intact and cleared temperate mangroves was found to be comparable to rates observed in the tropics. Disturbance of the surface biofilm resulted in elevated CO2 efflux across all habitats, suggesting the important role of surface biofilm communities in mediating CO2 efflux.

scholarly journals An Experimental Comparison of the Impact of ‘Warning’ and ‘Health Star Rating’ FoP Labels on Adolescents’ Choice of Breakfast Cereals in New Zealand

Nutrients ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1545 ◽  
Author(s):  
Robert Hamlin ◽  
Benjamin Hamlin
Keyword(s):  
New Zealand ◽  
Experimental Comparison ◽  
Vienna Convention ◽  
Single Star ◽  
Star Rating ◽  
Stop Sign ◽  
Significant Difference ◽  
Nutritional Label ◽  
The Difference ◽  
The Impact

This research investigated the performance of the red, octagonal Vienna Convention traffic ‘STOP’ sign as a front of pack (FoP) warning nutritional label. While the Vienna Convention traffic light system is an established FoP label, the potential of the ‘STOP’ sign in the role has not been investigated. The performance of the ‘STOP’ label was compared with that of a single star (low nutritional value) Australasian Health Star Rating (HSR) label using a fractionally replicated Latin square design. The labels were presented on choice diads of cold breakfast cereal packets. The sample of 240 adolescents aged 16–18 was drawn from a secondary school in the South Island of New Zealand. A large and significant main effect was observed at the p < 0.01 level for the difference between the ’STOP’ sign and the control condition (no nutritional FoP label), and at p < 0.05 for the difference between the HSR and the ‘STOP’ label. There was no significant difference between the HSR FoP and the control condition. A significant non-additivity (interaction) (p < 0.01) was also observed via the fractional replication. The results indicate that the Vienna Convention ‘STOP’ sign is worthy of further research with regard to its potential as an FoP nutritional label.

scholarly journals Back to Basics: Does Seed Size Affect Germination and Plant Uniformity in Broccoli (Brassica Oleracea var Italica)?

Proceedings ◽  
2020 ◽  
Vol 36 (1) ◽  
pp. 181
Author(s):  
Celia van Sprang ◽  
Gayathri Rajagopal
Keyword(s):  
Brassica Oleracea ◽  
Seed Size ◽  
Abiotic Factors ◽  
Crop Growth ◽  
Significant Difference ◽  
Field Uniformity ◽  
Direct Seeded ◽  
Subsequent Crop ◽  
Size Variability ◽  
The Impact

Hand harvested crops, such as brassicas and lettuce, are prone to high levels of variability during growth and at harvest. This necessitates multiple harvest passes and substantially increased labour costs for the grower. Both biotic and abiotic factors contribute to this lack of field uniformity. The main objective was to evaluate the impact of broccoli (Brassica oleracea var. Italica) seed size variability on germination, subsequent crop growth and harvest uniformity. An initial experiment was conducted where germination counts across three seed-size categories including, 2.0mm (SS1), 2.3 mm (SS2) and 2.45 mm (SS3), were recorded at 3, 7, 10 and 14 days after sowing (DAS). At 14 DAS, germination was greater in the SS1 (95%) and SS2 (91%) than the SS3 (66%) (P < 0.005). A second experiment evaluated the same seed categories planted under direct seeded (DS) and transplanted (TR) conditions to identify differences in crop growth and development. At 49 DAS, DS plant counts per plot were lowest for the SS3 (54.5 plants plot−1) compared with the SS1 (70.5 plants plot−1) and SS2 (64 plants plot−1). This could be attributed to the reduced seed coat thickness evident in the SS3 (66.3 μm) which can potentially lead to increased damage and mortality of the seed, compared with the SS1 (79.3 μm) and SS2 (73.1 μm). The TR treatment gave greater uniformity with no significant difference (P < 0.05) in plant populations across seed size categories (SS1 = 95, SS2 = 90 and SS3 = 96 plants plot−1).

scholarly journals Strategi Pengelolaan Hutan Mangrove Di Desa Tanggul Tlare Kecamatan Kedung Kabupaten Jepara

2018 ◽  
Vol 15 (2) ◽  
pp. 117 ◽  
Author(s):  
Bekti Utomo ◽  
Sri Budiastuty ◽  
Chatarina Muryani
Keyword(s):  
Forest Management ◽  
Random Sampling ◽  
Mangrove Forest ◽  
Management Strategy ◽  
Forest Community ◽  
Mangrove Forests ◽  
Technological Advancement ◽  
The Impact ◽  
Forest Rehabilitation ◽  
Cluster Random Sampling

Pengelolaan hutan mangrove merupakan hal yang penting dalam mengupayakan pelestarian lingkungan di kawasan pesisir. Tujuan penelitian adalah untuk mengetahui dampak kegiatan rehabilitasi hutan mangrove dan strategi pengelolaan hutan mangrove di Desa Tanggul Tlare, Kecamatan Kedung, Kabupaten Jepara.Penelitian ini menggunakan pendekatan survei dengan wawancara langsung dan pengamatan lapangan. Populasi adalah seluruh penduduk pesisir di daerah penelitian, teknik pengampilan sampel menggunakan “cluster random sampling”. Dampak yang ditimbulkan dengan adanya rehabilitasi hutan mangrove di daerah penelitian adalah meningkatnya hasil tangkapanikan, mengurangi abrasi pantai, menahantiupan angin laut, semakin banyak tangkapan biota (udang, kepiting, kerang) di pesisir, danmenjadikan kawasan tersebut menjadidaerah objek wisata. Strategi yang perlu dilakukan dalam pengelolaan hutan mangrove diantaranya yaitu memanfaatkan potensi yang ada dengan dengan melakukan penanaman pohon mangrove, membentuk kawasan hutan lindung konservasi hutan mangrove agar kawasan hutan mangrove tetap terjaga baik dan lestari, memberikan sosialisasi atau pemahaman kepada masyarakat akan pentingnya menjaga hutan mangrove dan manfaat yang didapat oleh masyarakat, pentingnya kemajuan teknologi dan memberikan beasiswa kepada masyarakat yang dikira berkompeten dan aktif dalam rehabilitasi mangrove untuk melanjutkan sekolah yang lebih tinggi agar ilmu pengetahuan yang didapat bisa memberikan kontribusi yang positif untuk pengelolaan hutan mangrove yang ideal..Kata kunci: hutan mangrove, masyarakat, pengelolaanEnglish Title: Mangrove Forest Management Strategy In The Village Of Environmental Tlare District Kedung District JeparaABSTRACTManagement of mangrove forests is an important aspect in the effort to conserve the environment in coastal areas. The purpose of this research is to know the impact of mangrove forest rehabilitation and mangrove forest management strategy in Tanggul Tlare Village, Kedung Sub-district, Jepara Regency. This research uses survey approach with direct interview and field observation. Population is the entire coastal population in the study area, sample technique using cluster random sampling. The impacts of mangrove forest rehabilitation in the study area were increased fish catch, reduced coastal abrasion, retained wind breeze, more biota catches (shrimp, crabs, shells) on the coast, and made the area a tourist destination. Strategies that need to be done in the management of mangrove forests include the utilization of existing potentials by planting mangrove trees, establishing protected forest areas of mangrove forest conservation so that the mangrove forest area is maintained well and sustainably, providing socialization or understanding to the community about the importance of maintaining mangrove forests and Benefits gained by the community, the importance of technological advancement and providing scholarships to people who are thought to be competent and active in mangrove rehabilitation to continue their higher education so that the knowledge gained can contribute positively to the management of the ideal mangrove forests.Keywords: mangrove forest, community, managementCitation: Utomo, B., Budiastuti, S dan Muryani, C. (2017). Strategi Pengelolaan Hutan Mangrove Di Desa Tanggul Tlare Kecamatan Kedung Kabupaten Jepara. Jurnal Ilmu Lingkungan, 15(2), 117-123, doi:10.14710/jil.15.2.117-123

scholarly journals MANGROVE FOREST CHANGE IN NUSA PENIDA MARINE PROTECTED AREA, BALI - INDONESIA USING LANDSAT SATELLITE IMAGERY

2019 ◽  
Vol 15 (2) ◽  
pp. 141 ◽  
Author(s):  
August Daulat ◽  
Widodo Setiyo Pranowo ◽  
Syahrial Nur Amri
Keyword(s):  
Satellite Imagery ◽  
Vegetation Cover ◽  
Protected Area ◽  
Mangrove Forest ◽  
Vegetation Index ◽  
Marine Protected Area ◽  
Mangrove Forests ◽  
Forest Change ◽  
Landsat Satellite ◽  
The Impact

Nusa Penida, Bali was designated as a Marine Protected Area (MPA) by the Klungkung Local Government in 2010 with support from the Ministry of Marine Affairs and Fisheries, Republic of Indonesia. Mangrove forests located in Nusa Lembongan Island inside the Nusa Penida MPA jurisdiction have decreased in biomass quality and vegetation cover. It’s over the last decades due to influences from natural phenomena and human activities, which obstruct mangrove growth. Study the mangrove forest changes related to the marine protected areas implementation are important to explain the impact of the regulation and its influence on future conservation management in the region. Mangrove forest in Nusa Penida MPA can be monitored using remote sensing technology, specifically Normalized Difference Vegetation Index (NDVI) from Landsat satellite imagery combined with visual and statistical analysis. The NDVI helps in identifying the health of vegetation cover in the region across three different time frames 2003, 2010, and 2017. The results showed that the NDVI decreased slightly between 2003 and 2010. It’s also increased significantly by 2017, where a mostly positive change occurred landwards and adverse change happened in the middle of the mangrove forest towards the sea.

scholarly journals Evaluating The Impact of Roads On The Diversity Pattern And Density of Trees To Improve The Conservation of Species

2021 ◽  
Author(s):  
Uzair Aslam Bhatti ◽  
Zhaoyuan Yu ◽  
Linwang Yuan ◽  
Luo Wen ◽  
Saqib Ali Nawaz ◽  
...  
Keyword(s):  
Native Species ◽  
Management Practices ◽  
Urban Forest ◽  
Abiotic Factors ◽  
Pairwise Distance ◽  
Ecological Environment ◽  
Plant Management ◽  
Diversity Pattern ◽  
Significant Difference ◽  
The Impact

Abstract Roads have a great impact on the structure and functioning of the diversity pattern in an ecological environment and play the role of altering biotic and abiotic factors. Clusters of plants grow along the roadside due to the interplay between the arrival of propagule and seedling establishment, which depends on the road’s specifications, land pattern, and road administration and protection practices. It is very important to study the diversity pattern in a metropolitan city to improve the ecological environment. Karachi is one of the world’s largest and fastest-growing metropolitan cities; however, little is known about the urban forest of the area. In Karachi, which is in the province of Sindh, Pakistan, roadside trees along various road types (e.g., wide, medium and narrow roads) have been studied. Based on a field study, various measures of diversity were utilized to investigate the diversity of tree species on different types of paths. A total of 180 plots, divided into three primary road groups, were surveyed. The highest quantity of tree biomass per unit area was found on wide roads, followed by medium roads. On narrow roads, the least biomass was detected. A single species or a limited number of species dominated the diversity of species. Conocarpus erectus was the most dominant non-native species along all types of roads, followed by the species Guaiacum officinale. A total of 76 species (32 non-native and 44 native) that were selectively spread along the roadsides of the city were studied. There was a significant difference in phylogenetic diversity (PD), phylogenetic mean pairwise distance (MPD) and phylogenetic mean nearest taxon distance (MNTD) between wide, medium, and narrow roads. Management practices have a significant positive correlation with diversity indices. Our study identified patterns of diversity in roadside trees in Karachi. It provided the basis for future plant conservation planning, such as the conservation of plant species, the maintenance of plant habitats, and the coordination of plant management in Karachi.

scholarly journals Dampak Pemulihan Mangrove Terhadap Bahan Baku, Kesempatan Kerja dan Pendapatan Keluarga Pesisir

2020 ◽  
pp. 30-37
Author(s):  
Julian Hisky Tyas Pambudi
Keyword(s):  
Household Income ◽  
Mangrove Forest ◽  
Sampling Method ◽  
Raw Materials ◽  
Forest Recovery ◽  
Mangrove Restoration ◽  
Significant Difference ◽  
Before And After ◽  
Recovery Program ◽  
The Impact

This study which was conducted in the coastal area of Rugemuk Village, Pantai Labu Subdistrict, Deli Serdang Regency aims to 1) analyze the impact of mangrove forest recovery program on mangrove cover area; 2) analyze the impact of mangrove recovery program on availability of raw materials of coastal agroindustry; 3) analyze the impact of mangrove forest recovery program on employment opportunities;  4) analyze the impact of mangrove recovery program on coastal household income. Data analysis method used in this research is comparative method that is Wilcoxon Match Pairs Test and Test-t. Sampling method used is simple random sampling method with the number of samples of 79 samples. The results showed that 1) There is increasing mangrove forest cover area after mangrove restoration program; 2) There is significant difference availability of raw materials of coastal agroindustry; 3) There is significant difference employment opportunities before and after mangrove restoration program; 4) There is significant difference in coastal household income before and after mangrove restoration program

scholarly journals Community Awareness on Domestic Waste Disposal Towards Its Impact to the Sustainability of Mangrove Forest in Kuala Selangor

2021 ◽  
Vol 934 (1) ◽  
pp. 012050
Author(s):  
N A Mazelan ◽  
F M Yusuff
Keyword(s):  
Waste Management ◽  
Waste Disposal ◽  
Mangrove Forest ◽  
Local Community ◽  
Mangrove Forests ◽  
Domestic Waste ◽  
Great Awareness ◽  
Community Awareness ◽  
Level Of Knowledge ◽  
The Impact

Abstract Mangrove forest in Kuala Selangor has seen to be depleting over the years. This study believes that domestic waste disposal is considered as one of the treats to mangrove forest. Local community must play their role in protecting the mangrove forest. This study aims to determine the level of knowledge of the community on the importance of mangrove, level of awareness on the impact of domestic waste disposal to mangroves and their level of practice on proper domestic waste management. Besides, this study aims to identify the correlation between community awareness with knowledge and practice. Structured questionnaire was used to collect data and analyzed using SPSS version 26 software. The finding shows that the level of knowledge of the community on the importance of sustaining mangrove forest is high (n=256, 85.3%), the level of awareness of community on the impact of domestic waste disposal is also high (Mean=4.48), while the level of community practice on proper domestic waste management is moderate (Mean=3.9). The correlation test showed that there was a negligible correlation between knowledge and awareness of community (r=0.14, <0.05, n=300) and also weak positive correlation between awareness and practice with (r=0.33, p<0.01, n=300. The finding suggests community with great knowledge does not necessarily have great awareness as well not necessarily with great awareness, community will practice good waste management to secure mangrove forests. Thus, this study recommends strictly enforcing all parties to comply/implementing control at source method, or develop appropriate management plans to reduce domestic waste disposal at mangrove areas.

Impact of Didymosphenia geminata on hyporheic conditions in trout redds: reason for concern?

2008 ◽  
Vol 59 (11) ◽  
pp. 1028 ◽  
Author(s):  
Tobias O. Bickel ◽  
Gerard P. Closs
Keyword(s):  
New Zealand ◽  
Surface Water ◽  
Water Exchange ◽  
Potential Surface ◽  
Didymosphenia Geminata ◽  
Exchange Processes ◽  
Significant Difference ◽  
Hydraulic Conditions ◽  
Groundwater Exchange ◽  
The Impact

Didymosphenia geminata (Lyngbye) Schmidt (commonly called didymo) is an invasive diatom and of concern to fisheries managers in North America and more recently New Zealand. Didymo grows in thick mats in several river systems on the South Island of New Zealand, often smothering entire river beds. Salmonid eggs, deposited in gravel nests (redds), depend on constant water exchange across the riverbed to provide oxygen-rich water for development. Thick didymo mats might restrict the flow of oxygen-rich water into spawning gravels, resulting in increased egg mortality and reduced trout recruitment. The present study measured hyporheic hydraulic conditions in trout redds with varying didymo cover in the Clutha River catchment, South Island, New Zealand. Didymo cover had no significant effects on several hydraulic variables (flow into the substrate, hydraulic conductivity and hyporheic oxygen concentration). However, there was a significant difference in the potential surface water–groundwater exchange between sites, suggesting some effect of didymo on hydraulic conditions. Considering the limited number of replicates, the impact of didymo on trout redds in the Clutha River cannot be excluded. The present study highlights the need for further research on the possible effects of didymo on important surface water–groundwater exchange processes.

Adverse events in cardiovascular disease patients taking clopidogrel: impact of CYP2C19 genotype polymorphisms

2020 ◽  
Author(s):  
Zegan Liu ◽  
Qian Hu ◽  
Li Tang ◽  
Junlong Ma ◽  
Jiangfan Cai ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Cardiovascular Diseases ◽  
Adverse Events ◽  
Antiplatelet Therapy ◽  
Onset Time ◽  
Cyp2c19 Genotype ◽  
Significant Difference ◽  
Main Factors ◽  
The Impact ◽  
Cyp2c19 Polymorphisms

Abstract Background: Clopidogrel combined with aspirin in antiplatelet therapy is the first-line clinical regimen for cardiovascular diseases. The CYP2C19 gene influences the absorption and metabolism of clopidogrel and its polymorphisms affect antiplatelet therapy drug efficacy, which may lead to adverse events including stent thrombosis and haemorrhage. The main objective of this study was to explore the impact of CYP2C19 polymorphisms on adverse events in cardiovascular disease patients.Methods:We recruited 350 patients taking clopidogrel and performed CYP2C19 genotype testing. Adverse event information was collected through telephone follow-up. According to CYP2C19 genotype results, patients were divided into three groups: poor metabolism (PM) group, extensive metabolism (EM) group and intermediate metabolism (IM) group. The number of adverse events was compared between the three groups using the chi-squared test and the onset time of adverse events was analysed using the log-rank test. The main factors affecting adverse events were analysed using binary logistic analysis.Results: In total, 326 patients were included in the analysis: 143 patients were in the EM group, 129 patients were in the IM group and 54 patients were in the PM group. In this cohort, 127 adverse events were noted, which occurred in 88 patients. There was no significant difference in the occurrence of adverse events between the EM group and PM group (P=0.185). The median survival times of adverse events in the EM, IM and PM groups were 112 days, 137.5 days and 169 days, respectively, with no significant differences between the three groups (P=0.8713).Conclusion:We found that CYP2C19 polymorphisms were not necessarily associated with adverse events in patients with cardiovascular diseases taking clopidogrel. Rather, the main factors influencing the occurrence of adverse events were concomitant diseases such as hypertension, diabetes and hyperlipidaemia.

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