scholarly journals Moving Seaweed Farms from Shallow to Deep Seawater to Cope with Warming and Diseases in Zanzibar. Current Socio-Economic and Cultural Barriers

2021 ◽  
Vol 14 (5) ◽  
pp. 29
Author(s):  
Makame Omar Makame ◽  
Ali Rashid Hamad ◽  
Muhammad Suleiman Said ◽  
Alice Mushi ◽  
Khadija Sharif
Keyword(s):  
Climate Change ◽  
Deep Water ◽  
High Tide ◽  
Cultural Barriers ◽  
Deep Seawater ◽  
Group Discussions ◽  
Seaweed Farming ◽  
Pemba Island ◽  
Seaweed Production ◽  
Water Space

This study aimed at identifying the climate and non-climate stressors affecting the seaweed farming practices. It also examines the deep water seaweed farming as a viable adaptation measure to these stressors and barriers that could constrained female seaweed farmers who are the majority. The study was carried out in six selected groups, two groups were from South District, Unguja Main Island (Furahiya Wanawake-Paje and Flower Group-Muungoni). And four groups were selected from Pemba Island (Tuwe Imara and Umoja Kazi- East Msuka and Ipo sababu and Umoja ni Nguvu – East Tumbe) from Micheweni District. These groups were selected because they participated in previous project implemented by Milele Zanzibar Foundation (MZF) and The Panje Project (TPP). Questionnaire interview collected various information related to the study from 111 seaweed farmers who are members of these groups. Information such as baseline seaweed production, climate change and diseases that affect seaweed production, farmer’s awareness on moving seaweed farms to deep water to cope with increasing warming and diseases and their capacity to swim as prerequisite for the adoption of this coping strategy. The focal group discussions were conducted in all six groups to collect various information to triangulate the findings collected from the questionnaire interview. The data obtained from three methods analyzed using descriptive statistics. The findings show that seaweed farming production has declined at least over the last seven years. Climate change and its variability, diseases, over utilization of shallow water space for farming seaweed, COVID 19 and price has contributed a lot in the observed decline. Deep water (0.5 meter during low tide and 3-5 meters during high tide) seaweed farming seen as viable option to cope and adapt to increasing warming and diseases but its adoption especially amongst female seaweed farmers constrained by their limited capacity to swim and their limited ownership of the vessels. The study also identified other barriers such as age, gender and cultural factors that could constrained female seaweed farmers from participation in swimming and sea safety training. To facilitate adoption of the deep-water seaweed farming method amongst the seaweed farmers, concerted effort should be made to overcome the barriers that are likely to limit the massive adoption of this method.

Fostering climate change consensus: The role of intimacy in group discussions

2021 ◽  
pp. 096366252110206
Author(s):  
Lyn M. van Swol ◽  
Emma Frances Bloomfield ◽  
Chen-Ting Chang ◽  
Stephanie Willes
Keyword(s):  
Climate Change ◽  
Group Discussion ◽  
Group Consensus ◽  
Group Discussions ◽  
Self Disclosure ◽  
Group Attraction ◽  
Climate Change Information ◽  
To Come ◽  
Collective Engagement

This study examined if creating intimacy in a group discussion is more effective toward reaching consensus about climate change than a focus on information. Participants were randomly assigned to either a group that spent the first part of an online discussion engaging in self-disclosure and focusing on shared values (intimacy condition) or discussing information from an article about climate change (information condition). Afterward, all groups were given the same instructions to try to come to group consensus on their opinions about climate change. Participants in the intimacy condition had higher ratings of social cohesion, group attraction, task interdependence, and collective engagement and lower ratings of ostracism than the information condition. Intimacy groups were more likely to reach consensus, with ostracism and the emotional tone of discussion mediating this effect. Participants were more likely to change their opinion to reflect that climate change is real in the intimacy than information condition.

scholarly journals Effects of climate change and industrialization on Lake Bolshoe Toko, eastern Siberia

2021 ◽  
Vol 65 (3) ◽  
pp. 335-352
Author(s):  
Boris K. Biskaborn ◽  
Biljana Narancic ◽  
Kathleen R. Stoof-Leichsenring ◽  
Lyudmila A. Pestryakova ◽  
Peter G. Appleby ◽  
...  
Keyword(s):  
Climate Change ◽  
Nineteenth Century ◽  
Deep Water ◽  
Boreal Lakes ◽  
Lake Ecosystem ◽  
Intermediate Water ◽  
Eastern Siberia ◽  
Natural Ecosystems ◽  
Planktonic Diatoms ◽  
Recent Climate

AbstractIndustrialization in the Northern Hemisphere has led to warming and pollution of natural ecosystems. We used paleolimnological methods to explore whether recent climate change and/or pollution had affected a very remote lake ecosystem, i.e. one without nearby direct human influence. We compared sediment samples that date from before and after the onset of industrialization in the mid-nineteenth century, from four short cores taken at water depths between 12.1 and 68.3 m in Lake Bolshoe Toko, eastern Siberia. We analyzed diatom assemblage changes, including diversity estimates, in all four cores and geochemical changes (mercury, nitrogen, organic carbon) from one core taken at an intermediate water depth. Chronologies for two cores were established using 210Pb and 137Cs. Sedimentation rates were 0.018 and 0.033 cm year−1 at the shallow- and deep-water sites, respectively. We discovered an increase in light planktonic diatoms (Cyclotella) and a decrease in heavily silicified euplanktonic Aulacoseira through time at deep-water sites, related to more recent warmer air temperatures and shorter periods of lake-ice cover, which led to pronounced thermal stratification. Diatom beta diversity in shallow-water communities changed significantly because of the development of new habitats associated with macrophyte growth. Mercury concentrations increased by a factor of 1.6 since the mid-nineteenth century as a result of atmospheric fallout. Recent increases in the chrysophyte Mallomonas in all cores suggested an acidification trend. We conclude that even remote boreal lakes are susceptible to the effects of climate change and human-induced pollution.

scholarly journals CAN SEAWEED FARMING IN THE TROPICS CONTRIBUTE TO CLIMATE CHANGE THROUGH EMISSION OF SHORT-LIVED HALOCARBONS?

2015 ◽  
Vol 34 (1) ◽  
pp. 8-19 ◽  
Author(s):  
Siew-Moi Phang ◽  
Fiona Seh-Lin Keng ◽  
Paramjeet-Kaur Mithoo Singh ◽  
Yong-Kian Lim ◽  
Noorsaadah Abd Rahman ◽  
...  
Keyword(s):  
Climate Change ◽  
Seaweed Farming ◽  
The Tropics

Impact of climate change and industrialization on remote Lake Bolshoe Toko, Siberia 

2021 ◽  
Author(s):  
Boris K. Biskaborn ◽  
Biljana Narancic ◽  
Kathleen R. Stoof-Leichsenring ◽  
Lyudmila A. Pestryakova ◽  
Peter G. Appleby ◽  
...  
Keyword(s):  
Climate Change ◽  
Deep Water ◽  
Boreal Lakes ◽  
Sediment Geochemistry ◽  
Long Distance ◽  
Lake Ecosystems ◽  
Planktonic Diatoms ◽  
Recent Climate Change ◽  
Recent Climate ◽  
Remote Lake

<p>To test if recent climate change and pollution affected remote lake ecosystems without direct human influence, we used paleolimnological methods on lake sediments from a large, prestine, and deep lake in Yakutia, Russia. We compared diatoms and sediment-geochemistry from before and after the onset of industrialization in the mid-nineteenth century, at water depths between 12.1 and 68.3 m in Lake Bolshoe Toko. We analyzed diatom species changes and geochemical changes including mercury concentrations. Chronologies were established using <sup>210</sup>Pb and <sup>137</sup>Cs revealing sedimentation rates between 0.018 and 0.033 cm y<sup>-1</sup> at shallow- and deep-water sites, respectively. Increase in light planktonic diatoms (<em>Cyclotella</em>) and decrease in heavily silicified euplanktonic <em>Aulacoseira</em> through time at deep-water sites can be related to warming air temperatures and shorter periods of lake-ice cover, causing pronounced thermal stratification. Diatom beta diversity changed only significantly in shallow-water communities which can be related to the development of new habitats with macrophyte growth. Mercury concentrations increased by a factor of 1.6 as a result of atmospheric fallout. Increases in the chrysophyte <em>Mallomonas</em> indicates a trend towards acidification. We conclude that also remote boreal lakes are susceptible to human-induced long-distance pollution and recent climate change.</p>

A gendered approach to understanding climate change impacts: lessons from a coastal region of Bangladesh.

2021 ◽  
pp. 11-25
Author(s):  
S. Momtaz ◽  
M. Asaduzzaman ◽  
Z. Kabir
Keyword(s):  
Climate Change ◽  
Focus Group ◽  
Adaptive Capacity ◽  
Coastal Region ◽  
Climate Change Impacts ◽  
Household Surveys ◽  
Group Discussions ◽  
Policy Makers ◽  
Key Informant ◽  
The Face

Abstract The purpose of this chapter is to understand the vulnerability of women's livelihoods to climate change impacts in Bangladesh. Data were collected through a survey of 150 randomly selected women from a sample of households. Focus group discussions, key informant interviews, participant observations, and a transect walk, provided supporting information to substantiate the household surveys. The chapter first outlines the theoretical foundation on which the research is based. This is followed by examining women's vulnerability in the study area. The chapter then describes women's coping strategies in the face of climate change-induced disasters. The chapter further explores women's adaptive capacity through the examination of their access to various services. It ends with a set of recommendations for policy makers in order to improve the situation of women's vulnerability.

The seaweed resources of the Philippines

2019 ◽  
Vol 62 (5) ◽  
pp. 483-498 ◽  
Author(s):  
Gavino C. Trono ◽  
Danilo B. Largo
Keyword(s):  
Review Paper ◽  
The Philippines ◽  
Production Volume ◽  
Fresh Weight ◽  
Culture Methods ◽  
Seaweed Farming ◽  
Political Unrest ◽  
Seaweed Production ◽  
Loss Of Genetic Diversity ◽  
Culture Technology

Abstract This review paper presents information on the production status of economically important seaweed species in the Philippines, new culture technologies for Halymenia durvillei and also an examination of the present but limited use of Sargassum. The country recorded its highest production volume of seaweeds (mainly eucheumatoids) in 2011 amounting to 1,840,832 metric tons (fresh weight). In the subsequent years, the Philippines recorded a steady decline in production which can be attributed to epiphytism, loss of genetic diversity due to the culture methods used (i.e. vegetative propagation), political unrest in the main farming areas of the Southern Philippines, and the frequent occurrence of typhoons. The more than 200,000 ha of farmable areas along available coastlines remain to be tapped and evaluated in order to determine which areas are suitable for seaweed farming. The haphazard harvesting of Sargassum led to the proclamation of Fisheries Order No. 250 which prohibits harvesting of Sargassum. Exploitation of Gelidiela acerosa remains a concern as there is no currently available culture technology for the species. The lack of comprehensive records on Philippine seaweed production needs to be addressed and its diverse algal resources remain to be explored.

scholarly journals THE UTILIZATION OF Halymenia durvillaei TO SUPPORT THE MANAGEMENT OF Eucheuma spinosum SEAWEED FARMING IN GEGER COASTAL AREA, BALI

2017 ◽  
Vol 4 (1) ◽  
pp. 65
Author(s):  
I Komang Dianto ◽  
I Wayan Arthana ◽  
Ni Made Ernawati
Keyword(s):  
Water Quality ◽  
Coastal Area ◽  
Production Management ◽  
Measured Data ◽  
Quality Data ◽  
Water Quality Data ◽  
Seaweed Farming ◽  
Seaweed Production ◽  
Control Water ◽  
Seaweed Culture

Seaweed farming activity is now facing some problems caused by pest fish herbivore and ice-ice disease. To solve those and improve our seaweed quality, seaweed production management requires some ecological technique improvements. The purpose of this study was to determine the functions of seaweed H. durvillaei for improving the production of the seaweed E. spinosum in the coastal area of Geger Beach, Peminge Village, South Kuta subdistrict, Badung regency, Bali. The measured data includes parameter of weight, length and water quality. Data was measured every 10 days for up to 40 days. The best growth result was shown by the model of E. spinosum that were fenced by H. durvillaei of 456 g for E. spinosum. H. durvillaei showed good impact on increasing the production of E. spinosum up to 68.7% compared to the control. Water quality conditions on seaweed culture was good with temperature ranged from 27.7 to 30.1°C, salinity from 30 to 32.3 ppt, DO from 3.9 to 5.5 ppm, pH from 7.9 to 8.4, current 0.1 to 0.2 m/s, and clearness of 100%.

Le Panache du Saguenay

1983 ◽  
Vol 40 (1) ◽  
pp. 52-60 ◽  
Author(s):  
J. Lebel ◽  
E. Pelletier ◽  
M. Bergeron ◽  
N. Belzile ◽  
G. Marquis
Keyword(s):  
Surface Layer ◽  
Deep Water ◽  
High Tide ◽  
Lawrence Estuary ◽  
Fresh Waters ◽  
Saguenay Fjord ◽  
Region Data ◽  
Saguenay River ◽  
St Lawrence Estuary ◽  
St Lawrence River

The large difference between the alkalinity of the fresh waters of the St. Lawrence River (1.475 mmol∙kg−1) and the Saguenay River (0.134 mmol∙kg−1) was used to locate the region on the St. Lawrence estuary which is under the influence of the Saguenay River. This method has the advantage over classical measurements such as salinity and temperature that it is independent of the upwelling of deep water in this region. Data was obtained in the St. Lawrence estuary near the mouth of the Saguenay fjord using a network of 33 stations at slack low tide and 23 stations at slack high tide. The results show that, at low tide, Saguenay water forms a plume which extends more than 10 km from the mouth of the fjord into the estuary. At high tide the plume is restricted to the surface layer as the Saguenay waters are pushed back into the fjord.

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