GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Key Considerations for the Use of Seaweed to Reduce Enteric Methane Emissions From Cattle
    Frontiers Media SA ; 2020
    In:  Frontiers in Veterinary Science Vol. 7 ( 2020-12-23)
    Details
    In: Frontiers in Veterinary Science, Frontiers Media SA, Vol. 7 ( 2020-12-23)
    Abstract: Enteric methane emissions are the single largest source of direct greenhouse gas emissions (GHG) in beef and dairy value chains and a substantial contributor to anthropogenic methane emissions globally. In late 2019, the World Wildlife Fund (WWF), the Advanced Research Projects Agency-Energy (ARPA-E) and the Foundation for Food and Agriculture Research (FFAR) convened approximately 50 stakeholders representing research and production of seaweeds, animal feeds, dairy cattle, and beef and dairy foods to discuss challenges and opportunities associated with the use of seaweed-based ingredients to reduce enteric methane emissions. This Perspective article describes the considerations identified by the workshop participants and suggests next steps for the further development and evaluation of seaweed-based feed ingredients as enteric methane mitigants. Although numerous compounds derived from sources other than seaweed have been identified as having enteric methane mitigation potential, these mitigants are outside the scope of this article.
    Type of Medium: Online Resource
    ISSN: 2297-1769
    URL: Article
    DOI: 10.3389/fvets.2020.597430
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2020
    detail.hit.zdb_id: 2834243-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Experimental assessment of the impacts of ocean acidification and urchin grazing on benthic kelp forest assemblages
    Elsevier BV ; 2021
    In:  Journal of Experimental Marine Biology and Ecology Vol. 540 ( 2021-07), p. 151548-
    Details
    In: Journal of Experimental Marine Biology and Ecology, Elsevier BV, Vol. 540 ( 2021-07), p. 151548-
    Type of Medium: Online Resource
    ISSN: 0022-0981
    URL: Article
    DOI: 10.1016/j.jembe.2021.151548
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 410283-6
    detail.hit.zdb_id: 1483103-X
    SSG: 12
    SSG: 7,20
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    PSVII-8 Effects of Processed Saccharina Latissima and Ascophyllum Nodosum on Ruminal Fermentation and Methane Production in Continuous Culture
    Oxford University Press (OUP) ; 2022
    In:  Journal of Animal Science Vol. 100, No. Supplement_3 ( 2022-09-22), p. 383-383
    Details
    In: Journal of Animal Science, Oxford University Press (OUP), Vol. 100, No. Supplement_3 ( 2022-09-22), p. 383-383
    Abstract: The aim of this study was to evaluate the effects of processed dietary supplements derived from two seaweeds, Saccharina latissima (SL) and Ascophyllum nodosum (AN), on microbial methane production and fermentation profile using in vitro methods. Four dual-flow continuous culture fermenters were utilized in a 4x4 Latin Square design to assess these 4 supplements: unwashed, coarsely milled SL (UNW), 3-min rinsed SL (3MR), 20-sec blanched SL (20SB), and a crude phlorotannin extract from AN (PHLT). Treatments were randomly assigned to fermenters and were top dressed on the total mixed ration (TMR) at 5% of total dry matter (DM). Four, 10-d experimental periods were conducted, consisting of a 7-d equilibration period followed by a 3-d sampling period. Vessel pH was continually measured, and effluent samples were collected for volatile fatty acid (VFA) analysis and calculation of DM, organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) digestibilities. Methane was measured prior to the first AM and PM feedings during the 3-d sampling period. Data were analyzed using the PROC MIXED procedure of SAS (9.4) with fermenter as the random effect and period and treatment as fixed effects. Processed treatments (3MR= 7.86, 20SB= 5.75, PHLT= 10.46 mg/dL) yielded less methane (P & lt; 0.02) than unprocessed (UNW= 24.06 mg/dL). Apparent digestibilities of DM, OM, NDF and ADF were not affected by treatment. Total VFA (mM) was greater (P = 0.02) in 3MR than PHLT. The acetate to propionate ratio (A:P) was greater (P & lt; 0.01) in PHLT compared with 20SB, 3MR and UNW (5.62 vs 1.47, 1.27 and 1.54, respectively). Time spent below pH 5.8 during fermentation was not affected by treatment. These results indicate that seaweed processing method can affect methane production in vitro without negatively impacting rumen fermentation and should be further investigated using in vivo models.
    Type of Medium: Online Resource
    ISSN: 0021-8812 , 1525-3163
    URL: Article
    DOI: 10.1093/jas/skac247.700
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 1490550-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Comparison of Multiple Macroalgae Cultivation Systems and End-Use Strategies Based Upon Techno-Economic and Life Cycle Assessment
    Elsevier BV ; 2022
    In:  SSRN Electronic Journal
    Details
    In: SSRN Electronic Journal, Elsevier BV
    Type of Medium: Online Resource
    ISSN: 1556-5068
    URL: Article
    DOI: 10.2139/ssrn.4119266
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    A Comparison of Multiple Macroalgae Cultivation Systems and End-Use Strategies of Saccharina latissima and Gracilaria tikvahiae Based on Techno-Economic Analysis and Life Cycle Assessment
    MDPI AG ; 2023
    In:  Sustainability Vol. 15, No. 15 ( 2023-08-07), p. 12072-
    Details
    In: Sustainability, MDPI AG, Vol. 15, No. 15 ( 2023-08-07), p. 12072-
    Abstract: Macroalgae can be processed into various products with the potential to substitute land-based crops; their cultivation can bioextract nutrients from coastal waters. This study investigated the economic cost and environmental impacts of multiple seaweed cultivation platforms, cultivation strategies, and processing/end-use strategies through techno-economic analysis (TEA) and life cycle assessment (LCA) with a focus on Saccharina latissima and Gracilaria tikvahiae. Cultivation platforms included single-layer longline, dual-layer longline, single-layer strip, and dual-layer strip systems. Processing/end-use products included seaweed to biofuel, dried sea vegetables, marketable commercial fertilizer, and animal feed. Economic and environmental costs decreased with dual-layer and strip cultivation systems. Cultivation costs were highest using the common single-layer longline system ($4.44 kg−1 dry weight (dw) S. latissima and $6.73 kg−1 dw G. tikvahiae when cultivated on rotation). The use of the dual-layer strip system reduced cultivation costs to $2.19 kg−1 dw for S. latissima and $3.43 kg−1 dw for G. tikvahiae. Seaweed drying was the major contributor to economic and environmental costs for macroalgae processing. Yet, all scenarios achieved environmental benefits for marine eutrophication. The best environmental performance was observed when biomass was processed to dry sea vegetables, assuming the offset of land-based vegetable production, or used as biofeedstock for anaerobic digestion for combined heat and power.
    Type of Medium: Online Resource
    ISSN: 2071-1050
    URL: Article
    DOI: 10.3390/su151512072
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2518383-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Diel temperature and pH variability scale with depth across diverse coral reef habitats
    Wiley ; 2020
    In:  Limnology and Oceanography Letters Vol. 5, No. 2 ( 2020-04), p. 193-203
    Details
    In: Limnology and Oceanography Letters, Wiley, Vol. 5, No. 2 ( 2020-04), p. 193-203
    Abstract: Coral reefs are facing intensifying stressors, largely due to global increases in seawater temperature and decreases in pH. However, there is extensive environmental variability within coral reef ecosystems, which can impact how organisms respond to global trends. We deployed spatial arrays of autonomous sensors across distinct shallow coral reef habitats to determine patterns of spatiotemporal variability in seawater physicochemical parameters. Temperature and pH were positively correlated over the course of a day due to solar heating and light‐driven metabolism. The mean temporal and spatial ranges of temperature and pH were positively correlated across all sites, with different regimes of variability observed in different reef types. Ultimately, depth was a reliable predictor of the average diel ranges in both seawater temperature and pH. These results demonstrate that there is widespread environmental variability on diel timescales within coral reefs related to water column depth, which needs to be included in assessments of how global change will locally affect reef ecosystems.
    Type of Medium: Online Resource
    ISSN: 2378-2242 , 2378-2242
    URL: Issue
    URL: Article
    DOI: 10.1002/lol2.v5.2
    DOI: 10.1002/lol2.10129
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2876718-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Sinking seaweed in the deep ocean for carbon neutrality is ahead of science and beyond the ethics
    IOP Publishing ; 2022
    In:  Environmental Research Letters Vol. 17, No. 8 ( 2022-08-01), p. 081003-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 17, No. 8 ( 2022-08-01), p. 081003-
    Abstract: Sinking vast amounts of seaweed in the deep ocean is currently being proposed as a promising ocean carbon dioxide removal strategy as well as a natural-based solution to mitigate climate change. Still, marketable carbon offsets through large-scale seaweed sinking in the deep ocean lack documentation and could involve unintended environmental and social consequences. Managing the risks requires a number of urgent actions.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/ac82ff
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2255379-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Calcification accretion units ( CAUs ): A standardized approach for quantifying recruitment and calcium carbonate accretion in marine habitats
    Wiley ; 2022
    In:  Methods in Ecology and Evolution Vol. 13, No. 7 ( 2022-07), p. 1436-1446
    Details
    In: Methods in Ecology and Evolution, Wiley, Vol. 13, No. 7 ( 2022-07), p. 1436-1446
    Abstract: Standardized metrics that quantify a component of ecosystem functioning are essential for evaluating the current status of coastal marine habitats and for monitoring how ecologically important ecosystems are changing in response to global and local environmental change. Calcification accretion units (CAUs) are a standardized tool for quantifying net calcium carbonate accretion, early successional community structure, recruitment of algae and sessile invertebrates and other response metrics that can be determined from image analyses in coastal marine habitats. CAUs are comprised of paired‐settlement tiles that are separated by a spacer. This design mimics the presence of different representative habitats that are common in most marine systems such as exposed benthic surfaces, cryptic spaces inaccessible to grazers and shaded overhangings. The protected space between the tiles facilitates recruitment and inclusion of cryptic taxa in community assemblage estimates. After a period of deployment, CAUs are photographed for image analysis and then decalcified to quantify calcium carbonate accretion rates. The CAU methodology provides a cost‐effective, standardized protocol for evaluating structure and function in marine benthic habitats. We illustrate how CAU data can be used to compare accretion rates and the relative proportion of carbonate polymorphs in ecosystems across the globe. Here we provide a comprehensive standard operating procedure for building, deploying and processing CAUs, to ensure that a consistent protocol is used for accurate data collection and cross‐system comparative studies.
    Type of Medium: Online Resource
    ISSN: 2041-210X , 2041-210X
    URL: Issue
    URL: Article
    DOI: 10.1111/mee3.v13.7
    DOI: 10.1111/2041-210X.13867
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2528492-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Data_Sheet_1.docx
    Frontiers Media SA ; 2023
    In:  Frontiers in Veterinary Science Vol. 10 ( 2023-7-6)
    Details
    In: Frontiers in Veterinary Science, Frontiers Media SA, Vol. 10 ( 2023-7-6)
    Abstract: There is a growing interest in utilizing seaweed in ruminant diets for mitigating enteric methane (CH 4 ) emissions while improving animal health. Chondrus crispus is a red seaweed that grows in the Gulf of Maine (United States) and has shown to suppress CH 4 production in vitro . Organic dairy producers in Maine are currently feeding seaweed due to herd health promoting benefits. However, large-scale adoption depends on technical and financial factors, as well as validation from pilot studies. Methods A survey was developed to identify barriers and drivers towards the adoption of CH 4 -reducing algal-based feeds. Concurrently, a randomized complete block design study was conducted to investigate the effect of C. crispus on enteric CH 4 emissions and milk production in a typical Maine organic dairy farm. Twenty-two organically certified Holstein and Jersey cows averaging 29 ± 6.8 kg of milk/d and 150 ± 69 days in milk, were blocked and randomly assigned to a control diet without C. crispus (0CC), or with 6% [dry matter (DM) basis] C. crispus (6CC). Samples were collected on the last week of the 2-wk covariate period, and wk 3, 5, 8, and 10 after initiation of treatments for a total of 12 weeks. Gaseous emissions were measured using a GreenFeed unit. Data were analyzed using the MIXED procedure of SAS with repeated measures over time. Results All survey respondents ( n = 35; 54% response rate) were familiar with seaweeds as feed, and 34% were already users. Producers who were willing to pay 0.64 USD/cow/d on average for a CH 4 -reducing algal-based feed, also stated the need for co-benefits in terms of cattle health and performance as a requirement for adoption. Feeding 6CC decreased enteric CH 4 production by 13.9% compared with 0CC (401 vs. 466 g/d). Further, milk yield (mean = 27.1 kg/d), CH 4 intensity (mean = 15.2 g of CH 4 /kg of energy corrected milk), and concentrations and yields of milk fat and true protein were not affected by treatments. Discussion Producer receptiveness to CH 4 -reducing algal-based feeds will not only be dependent on purchase price, but also on co-benefits and simplicity of integration into existing feed practices. Feeding C. crispus at 6% of the diet DM decreased CH 4 production in dairy cows by 13.9% without negative effects on milk yield and composition. Identifying the bioactive compounds in C. crispus is critical to understand the effect of this red seaweed on mitigating enteric CH 4 emissions in dairy cows.
    Type of Medium: Online Resource
    ISSN: 2297-1769
    URL: Article
    URL: Article
    DOI: 10.3389/fvets.2023.1153097
    DOI: 10.3389/fvets.2023.1153097.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2023
    detail.hit.zdb_id: 2834243-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Consequences of warming and acidification for the temperate articulated coralline alga, Calliarthron tuberculosum (Florideophyceae, Rhodophyta)
    Wiley ; 2022
    In:  Journal of Phycology Vol. 58, No. 4 ( 2022-08), p. 517-529
    Details
    In: Journal of Phycology, Wiley, Vol. 58, No. 4 ( 2022-08), p. 517-529
    Abstract: Global climate changes, such as warming and ocean acidification (OA), are likely to negatively impact calcifying marine taxa. Abundant and ecologically important coralline algae may be particularly susceptible to OA; however, multi‐stressor studies and those on articulated morphotypes are lacking. Here, we use field observations and laboratory experiments to elucidate the impacts of warming and acidification on growth, calcification, mineralogy, and photophysiology of the temperate articulated coralline alga, Calliarthron tuberculosum. We conducted a 4‐week fully factorial mesocosm experiment exposing individuals from a southern CA kelp forest to current and future temperature and pH/ p CO 2 conditions (+2°C, −0.5 pH units). Calcification was reduced under warming (70%) and further reduced by high p CO 2 or high p CO 2 x warming (~150%). Growth (change in linear extension and surface area) was reduced by warming (40% and 50%, respectively), high p CO 2 (20% and 40%, respectively), and high p CO 2 x warming (50% and 75%, respectively). The maximum photosynthetic rate (P max ) increased by 100% under high p CO 2 conditions, but we did not detect an effect of p CO 2 or warming on photosynthetic efficiency (α). We also did not detect the effect of warming or p CO 2 on mineralogy. However, variation in Mg incorporation in cell walls of different cell types (i.e., higher mol % Mg in cortical vs. medullary) was documented for the first time in this species. These results support findings from a growing body of literature suggesting that coralline algae are often more negatively impacted by warming than OA, with the potential for antagonistic effects when factors are combined.
    Type of Medium: Online Resource
    ISSN: 0022-3646 , 1529-8817
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.v58.4
    DOI: 10.1111/jpy.13272
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...