scholarly journals Spore morphology, taxonomical and ecological importance of bryophyta from Turkey

2018 ◽  
Vol 27 (2) ◽  
pp. 215-223
Author(s):  
ERKARA Ismuhan Potoglu; BIRGI
Keyword(s):  
Spore Morphology ◽  
Ecological Importance

Chemical Ecology and Off-Flavour Substances

1988 ◽  
Vol 20 (8-9) ◽  
pp. 167-178
Author(s):  
O. M. Skulberg
Keyword(s):  
Environmental Factors ◽  
Chemical Ecology ◽  
Aquatic Environment ◽  
Metabolic Pathways ◽  
Chemical Properties ◽  
Relevant Research ◽  
Fundamental Research ◽  
Biotic Effects ◽  
Ecological Mechanisms ◽  
Ecological Importance

Off-flavour substances may be regarded as a resource which can be used to study special ecological mechanisms. Relevant research on off-flavours is inextricably combined with the study of perception, ethology, genetic control etc. The chemicals concerned are commonly perceived by the senses of olfaction and gustation. Thus research on the chemical ecology of off-flavour substances in the aquatic environment involves the study of a variety of disciplines. For example the biochemistry of the relevant substances and appropriate metabolic pathways must be considered. Chemical properties are important for the behaviour of the substances. The production of off-flavours by organisms is related to phenological circumstances. The biotic effects of ecologically significant substances are dependent on several environmental factors. This paper draws attention to the possible application of fundamental research in this area to selected problems of ecological importance.

Mapeamento do Descarte de Medicamentos em um Município do Sul de Minas Gerais/ Mapping and Disposal of Medicines at a Municipality in Southern Minas Gerais

1970 ◽  
Vol 5 (1) ◽  
pp. 35-44
Author(s):  
Daniele Cristina Braz Dos Santos ◽  
Alexandre Magno Batista Machado ◽  
Fábio Vieira Lacerda
Keyword(s):  
Water Resources ◽  
Minas Gerais ◽  
Sectional Study ◽  
Self Medication ◽  
The Public ◽  
Unused Medications ◽  
Ecological Importance ◽  
City State ◽  
Soil Water Resources ◽  
Proper Disposal

Objetivo: O trabalho teve por objetivo mapear, quantificar e verificar a destinação dos medicamentos vencidos e em desuso, e contribuir com uma discussão sobre os problemas gerados com a destinação imprópria desses medicamentos e os impactos causados ao meio ambiente na cidade de Itajubá/MG. Materiais e Métodos: A pesquisa utilizou o método quantitativo de corte transversal, sendo realizada no período de maio a agosto de 2014. Participaram da pesquisa um total de trinta farmácias da cidade de Itajubá. As entrevistas foram realizadas com os responsáveis técnicos das farmácias (farmacêuticos), de forma individual, procurando identificar a forma de manejo e descarte dos fármacos. Do mesmo modo, procurou-se evidenciar como os colaboradores se comportam em relação a importância ecológica do descarte correto e como veem a importância de conscientizar a população. Resultados e Discussão: O consumo de medicamentos vem aumentando expressivamente nas últimas décadas, devido ao estímulo publicitário e à automedicação. Com isso, cada vez mais medicamentos são produzidos e descartados de forma inadequada, o que põe em risco o solo, os recursos hídricos e principalmente, a saúde humana. Por meio dos resultados obtidos pode-se perceber que poucos indivíduos possuem a conscientização do descarte correto dos medicamentos. Conclusão: A falta de colaboração por parte do poder público local em instruir a comunidade pode ser um dos motivos onde ainda existem muitas pessoas desinformadas. Apesar das farmácias estarem implementando um programa de destinação, poucas entendem ou sabem a destinação correta dos resíduos de medicamentos. Palavra-chave: Saúde. Medicamento. Destinação. ABSTRACTObjective: The study aimed to map, quantify and verify the allocation of accrued and unused medications, and contribute to a discussion of the problems created by improper disposal of these medications and the impacts to the environment in the Itajubá city state/MG. Materials and Methods: The research used a cross quantitative sectional study and was conducted in the period May to August 2014.  A total of 30 pharmacies from Itajubá participated. Interviews were conducted with the technical managers of the establishments surveyed, individually, seeking to identify the form of handling and disposal of medications. Similarly, sought to highlight how employees behave towards the ecological importance of proper disposal and how they see the importance to educate the public. Results and Discussion: The consumption of drugs has been increasing significantly in recent decades due to the advertising stimulus and self-medication. With this, more and more medications are produced and discarded improperly, putting the soil, water resources and especially human health at risk. Through the results obtained can be seen that few individuals possess the awareness of proper disposal of medications. Conclusion: The lack of cooperation from the local government to instruct the community can be one of the reasons where there are still many uninformed people. Although pharmacies are implementing a program allocation, few understand or know the proper disposal of waste medicines. Keywords: Health. Medicine. Destination

scholarly journals Highly restricted dispersal in habitat-forming seaweed may impede natural recovery of disturbed populations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Florentine Riquet ◽  
Christiane-Arnilda De Kuyper ◽  
Cécile Fauvelot ◽  
Laura Airoldi ◽  
Serge Planes ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Spatial Scales ◽  
Mediterranean Ecosystems ◽  
Dispersal Distance ◽  
Genetic Connectivity ◽  
Restricted Gene Flow ◽  
Isolated Populations ◽  
Natural Recovery ◽  
Limited Dispersal ◽  
Ecological Importance

AbstractCystoseira sensu lato (Class Phaeophyceae, Order Fucales, Family Sargassaceae) forests play a central role in marine Mediterranean ecosystems. Over the last decades, Cystoseira s.l. suffered from a severe loss as a result of multiple anthropogenic stressors. In particular, Gongolaria barbata has faced multiple human-induced threats, and, despite its ecological importance in structuring rocky communities and hosting a large number of species, the natural recovery of G. barbata depleted populations is uncertain. Here, we used nine microsatellite loci specifically developed for G. barbata to assess the genetic diversity of this species and its genetic connectivity among fifteen sites located in the Ionian, the Adriatic and the Black Seas. In line with strong and significant heterozygosity deficiencies across loci, likely explained by Wahlund effect, high genetic structure was observed among the three seas (ENA corrected FST = 0.355, IC = [0.283, 0.440]), with an estimated dispersal distance per generation smaller than 600 m, both in the Adriatic and Black Sea. This strong genetic structure likely results from restricted gene flow driven by geographic distances and limited dispersal abilities, along with genetic drift within isolated populations. The presence of genetically disconnected populations at small spatial scales (< 10 km) has important implications for the identification of relevant conservation and management measures for G. barbata: each population should be considered as separated evolutionary units with dedicated conservation efforts.

Multi-level social-ecological networks in a payments for ecosystem services programme in central Veracruz, Mexico

2020 ◽  
pp. 1-7
Author(s):  
Alfonso Langle-Flores ◽  
Adriana Aguilar Rodríguez ◽  
Humberto Romero-Uribe ◽  
Julia Ros-Cuéllar ◽  
Juan José Von Thaden
Keyword(s):  
Ecosystem Services ◽  
Spatial Scales ◽  
Payments For Ecosystem Services ◽  
Collaboration Network ◽  
Governmental Organizations ◽  
Social Ecological ◽  
Non Governmental Organizations ◽  
Conservation Activity ◽  
Ecological Importance ◽  
Hydrological Services

Summary Payments for ecosystem services (PES) programmes have been considered an important conservation mechanism to avoid deforestation. These environmental policies act in social and ecological contexts at different spatial scales. We evaluated the social-ecological fit between stakeholders and ecosystem processes in a local PES programme across three levels: social, ecological and social-ecological. We explored collaboration among stakeholders, assessed connectivity between forest units and evaluated conservation activity links between stakeholders and forest units. In addition, to increase programme effectiveness, we classified forest units based on their social and ecological importance. Our main findings suggest that non-governmental organizations occupy brokerage positions between landowners and government in a dense collaboration network. We also found a partial spatial misfit between conservation activity links and the forest units that provide the most hydrological services to Xalapa. We conclude that conservation efforts should be directed towards the middle and high part of the Pixquiac sub-watershed and that the role of non-governmental organizations as mediators should be strengthened to increase the efficiency and effectiveness of the local PES programme.

scholarly journals Volatile organic compound patterns predict fungal trophic mode and lifestyle

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Yuan Guo ◽  
Werner Jud ◽  
Fabian Weikl ◽  
Andrea Ghirardo ◽  
Robert R. Junker ◽  
...  
Keyword(s):  
Organic Compound ◽  
Fungal Species ◽  
Chemical Diversity ◽  
Phenotypic Integration ◽  
Ecological Studies ◽  
Volatile Organic ◽  
Ecological Importance ◽  
Fungal Interactions ◽  
Computational Analyses ◽  
Different Levels

AbstractFungi produce a wide variety of volatile organic compounds (VOCs), which play central roles in the initiation and regulation of fungal interactions. Here we introduce a global overview of fungal VOC patterns and chemical diversity across phylogenetic clades and trophic modes. The analysis is based on measurements of comprehensive VOC profiles of forty-three fungal species. Our data show that the VOC patterns can describe the phyla and the trophic mode of fungi. We show different levels of phenotypic integration (PI) for different chemical classes of VOCs within distinct functional guilds. Further computational analyses reveal that distinct VOC patterns can predict trophic modes, (non)symbiotic lifestyle, substrate-use and host-type of fungi. Thus, depending on trophic mode, either individual VOCs or more complex VOC patterns (i.e., chemical communication displays) may be ecologically important. Present results stress the ecological importance of VOCs and serve as prerequisite for more comprehensive VOCs-involving ecological studies.

scholarly journals Projections for Mexico’s Tropical Rainforests Considering Ecological Niche and Climate Change

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 119
Author(s):  
Antonio Fidel Santos-Hernández ◽  
Alejandro Ismael Monterroso-Rivas ◽  
Diódoro Granados-Sánchez ◽  
Antonio Villanueva-Morales ◽  
Malinali Santacruz-Carrillo
Keyword(s):  
Climate Change ◽  
Ecological Niche ◽  
Potential Distribution ◽  
Tropical Rainforest ◽  
Statistical Significance ◽  
Climate Change Scenarios ◽  
Climate Conditions ◽  
Tropical Regions ◽  
Temperature And Precipitation ◽  
Ecological Importance

The tropical rainforest is one of the lushest and most important plant communities in Mexico’s tropical regions, yet its potential distribution has not been studied in current and future climate conditions. The aim of this paper was to propose priority areas for conservation based on ecological niche and species distribution modeling of 22 species with the greatest ecological importance at the climax stage. Geographic records were correlated with bioclimatic temperature and precipitation variables using Maxent and Kuenm software for each species. The best Maxent models were chosen based on statistical significance, complexity and predictive power, and current potential distributions were obtained from these models. Future potential distributions were projected with two climate change scenarios: HADGEM2_ES and GFDL_CM3 models and RCP 8.5 W/m2 by 2075–2099. All potential distributions for each scenario were then assembled for further analysis. We found that 14 tropical rainforest species have the potential for distribution in 97.4% of the landscape currently occupied by climax vegetation (0.6% of the country). Both climate change scenarios showed a 3.5% reduction in their potential distribution and possible displacement to higher elevation regions. Areas are proposed for tropical rainforest conservation where suitable bioclimatic conditions are expected to prevail.

scholarly journals Study on the spore morphology of Ceratopteris Brongn.

2020 ◽  
Vol 559 ◽  
pp. 012022
Author(s):  
Xiao-Juan Li ◽  
Na Li ◽  
Bing-Hong Wang ◽  
Jian-Xiu Li
Keyword(s):  
Spore Morphology

scholarly journals Ecological Importance of Cross-Feeding of the Intermediate Metabolite 1,2-Propanediol between Bacterial Gut Symbionts

2020 ◽  
Vol 86 (11) ◽  
Author(s):  
Christopher C. Cheng ◽  
Rebbeca M. Duar ◽  
Xiaoxi Lin ◽  
Maria Elisa Perez-Munoz ◽  
Stephanie Tollenaar ◽  
...  
Keyword(s):  
Trophic Interactions ◽  
Lactobacillus Reuteri ◽  
Trophic Interaction ◽  
Bacterial Strains ◽  
Content Type ◽  
Bifidobacterium Breve ◽  
Gut Symbionts ◽  
Gnotobiotic Mice ◽  
Ecological Importance ◽  
Isogenic Mutants

ABSTRACT Cross-feeding based on the metabolite 1,2-propanediol has been proposed to have an important role in the establishment of trophic interactions among gut symbionts, but its ecological importance has not been empirically established. Here, we show that in vitro growth of Lactobacillus reuteri (syn. Limosilactobacillus reuteri) ATCC PTA 6475 is enhanced through 1,2-propanediol produced by Bifidobacterium breve UCC2003 and Escherichia coli MG1655 from the metabolization of fucose and rhamnose, respectively. Work with isogenic mutants showed that the trophic interaction is dependent on the pduCDE operon in L. reuteri, which encodes the ability to use 1,2-propanediol, and the l-fucose permease (fucP) gene in B. breve, which is required for 1,2-propanediol formation from fucose. Experiments in gnotobiotic mice revealed that, although the pduCDE operon bestows a fitness burden on L. reuteri ATCC PTA 6475 in the mouse digestive tract, the ecological performance of the strain was enhanced in the presence of B. breve UCC2003 and the mucus-degrading species Bifidobacterium bifidum. The use of the respective pduCDE and fucP mutants of L. reuteri and B. breve in the mouse experiments indicated that the trophic interaction was specifically based on 1,2-propanediol. Overall, our work established the ecological importance of cross-feeding relationships based on 1,2-propanediol for the fitness of a bacterial symbiont in the vertebrate gut. IMPORTANCE Through experiments in gnotobiotic mice that employed isogenic mutants of bacterial strains that produce (Bifidobacterium breve) and utilize (Lactobacillus reuteri) 1,2-propanediol, this study provides mechanistic insight into the ecological ramifications of a trophic interaction between gut symbionts. The findings improve our understanding on how cross-feeding influences the competitive fitness of L. reuteri in the vertebrate gut and revealed a putative selective force that shaped the evolution of the species. The findings are relevant since they provide a basis to design rational microbial-based strategies to modulate gut ecosystems, which could employ mixtures of bacterial strains that establish trophic interactions or a personalized approach based on the ability of a resident microbiota to provide resources for the incoming microbe.

scholarly journals Spore Morphology of Indian Ferns II. Aspleniaceae and Blechnaceae

1964 ◽  
Vol 5 (2) ◽  
pp. 222-246 ◽  
Author(s):  
B. K. Nayar ◽  
Santha Devi
Keyword(s):  
Spore Morphology
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