The role of riparian vegetation in the evaluation of ecosystem health: The case of semiarid conditions in Northern Mexico

2018 ◽  
Vol 35 (1) ◽  
pp. 48-59 ◽  
Author(s):  
Daniel Castro‐López ◽  
Víctor Guerra‐Cobián ◽  
Narcís Prat
Keyword(s):  
Riparian Vegetation ◽  
Ecosystem Health ◽  
Northern Mexico ◽  
Semiarid Conditions

scholarly journals An Evaluation of the Formative Experiences of Students Enrolled in Postgraduate Studies in Education: Case Study in Northern Mexico

2021 ◽  
Vol 13 (9) ◽  
pp. 4790
Author(s):  
Brenda Imelda Boroel Cervantes ◽  
José Alfonso Jiménez Moreno ◽  
Salvador Ponce Ceballos ◽  
José Sánchez Santamaría
Keyword(s):  
Data Analysis ◽  
Focus Groups ◽  
Teaching Staff ◽  
Training Context ◽  
Northern Mexico ◽  
Postgraduate Studies ◽  
Successful Design ◽  
Formative Experiences

The educational journey in postgraduate programs is linked to the actors, processes and results, setting the tone for different approaches from the perspective of characterization, development and evaluation. It is summarized in a sequential manner in four stages: entry to the program, progress within the program, and the final educational stretch, where the instructor/tutor plays an important part and obtaining the diploma or degree. The goal of this research was to evaluate, using the students’ perceptions, formative experiences as a result of their academic journey in postgraduate programs within education in Northern Mexico. We have used a case study based on the focus groups technique, applied to a sample of cases comprised of students enrolled in their final educational stage. The information was analyzed using inductive data analysis. The main results were grouped into three meta categories: (1) development of professional skills for the successful design of the intervention proposal, which unfolded into four categories; (2) the role of the tutor during the formative process, consisting of four analysis categories and (3) contributions of the teaching staff in their profession, consisting of two categories. These trends also evidence the formative abundance in the personal, academic and social training context of the students.

scholarly journals The role of biomarkers in the assessment of aquatic ecosystem health

2014 ◽  
Vol 10 (3) ◽  
pp. 327-341 ◽  
Author(s):  
Sharon E Hook ◽  
Evan P Gallagher ◽  
Graeme E Batley
Keyword(s):  
Aquatic Ecosystem ◽  
Ecosystem Health

Justice and the Geographies of Moral Protest: Reflections from Mexico

10.1068/d6708 ◽  
2009 ◽  
Vol 27 (2) ◽  
pp. 216-233 ◽  
Author(s):  
Melissa W Wright
Keyword(s):  
Social Justice ◽  
Violence Against Women ◽  
Political Action ◽  
Protest Movements ◽  
Spatial Transformations ◽  
Northern Mexico ◽  
Women's Participation ◽  
Women And Girls ◽  
Do So

Protest movements offer a rich vernacular for investigating how the connections between social justice and creating political subjects always involve spatial transformations. In this paper, I put Jacques Derrida's contemplations regarding justice as incalculable in conversation with critiques of public witnessing and the role of empathy for catalyzing political action, and I do so to present some speculations over why a social justice movement in northern Mexico has weakened domestically as it has gained steam internationally. The movement has grown since 1993 in response to the violence against women and girls and the surrounding impunity that has made northern Mexico famous as a place of ‘femicide’. By examining these events in relation to the debates on calculating justice and on the politics of witnessing, I hope to add to the growing literature within and beyond geography on the interplay of emotion and social justice politics while illustrating what is at stake in these dynamics for Mexico's democracy and for women's participation in it.

N and P limitation shapes plant-AMF interactions across an aridity gradient

2020 ◽  
Author(s):  
Svenja Stock ◽  
Moritz Köster ◽  
Jens Boy ◽  
Roberto Godoy ◽  
Francisco Nájera ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Drought Resistance ◽  
Plant Nutrition ◽  
Water Shortage ◽  
Aridity Gradient ◽  
P Limitation ◽  
Mediterranean Conditions ◽  
Mediterranean Woodland ◽  
Semiarid Conditions

<p>Arbuscular mycorrhizal fungi (AMF) are important partners in plant nutrition, as they increase the range to scavenge for nutrients and can access resources otherwise occlude for plants. Under water shortage, when mobility of nutrients in soil is limited, AMF are especially important to acquire resources and can modulate plant drought resistance. Strategies of plants to cope with water and nutrient restrictions are shaped by the intensity of aridity. To investigate the effect of aridity on plant-AMF associations regarding drought resistance and plant nutrient acquisition, a <sup>13</sup>CO<sub>2</sub> pulse labeling was conducted across an aridity gradient. In a semiarid shrubland (66 mm a<sup>-1</sup>), a Mediterranean woodland (367 mm a<sup>-1</sup>), and a humid temperate forest (1500 mm a<sup>-1</sup>), root and soil samples were taken from 0-10 cm and 20-30 cm soil depth before labeling and at 1 day, 3 days, and 14 days after labeling. Carbon (C), nitrogen (N), and phosphorus (P) stocks as well as AMF root colonization, extraradical AMF biomass (phospho- and neutral lipid fatty acids (PLFA and NLFA) 16:1w5c), specific root length (SRL), and root tissue density (RTD) were measured. Plant C investment into AMF and roots was determined by the <sup>13</sup>C incorporation in 16:1w5c (PLFA and NLFA) and root tissue, respectively. Soil C:N:P stoichiometry indicated a N and P limitation under humid conditions and a P limitation in the topsoil under Mediterranean conditions. N stocks were highest in the Mediterranean woodland. A strong correlation of the AMF storage compound NLFA 16:1w5c to C:P ratio under semiarid conditions pointed to a P limitation of AMF, likely resulting from low P mobility in dry and alkaline soils. With increasing aridity, the AMF abundance in root (and soil) decreased from 45% to 20% root area. <sup>13</sup>C incorporation in PLFA 16:1w5c was similar across sites, while relative AMF abundance in topsoil (PLFA 16:1w5c:SOC) was slightly higher under semiarid and humid than under Mediterranean conditions, pointing to the importance of AMF for plant nutrition under nutrient limitation. Additionally, PLFA 16:1w5c contents in soil were higher with lower P availability in each site, underlining the role of AMF to supply P for plants under P deficiency. Under humid conditions (with strong N and P limitation) and semiarid conditions (with strong water limitation), root AMF colonization increased with lower N availability, displaying the role of AMF for plant N nutrition under nutrient and/or water shortage. Under humid and Mediterranean conditions, SRL decreased (0.5 and 0.3 times, respectively) and RTD increased (1.9 and 1.7 times, respectively) with depth, indicating a drought tolerance strategy of plants to sustain water shortage. Under semiarid conditions, SRL increased with depth (2.3 times), while RTD was consistently high, suggesting an increasing proportion of long-living fine roots with depth as scavenging agents for water. These relations point to a drought avoidance strategy of plants as adaptation to long-term water limitation. Under strong nutrient limitation, as under humid and semiarid conditions, AMF are crucial to sustain plant nutrition and to enhance plant resistance to water shortage.</p>

scholarly journals Defining the role of omics in assessing ecosystem health: Perspectives from the Canadian environmental monitoring program

2015 ◽  
Vol 35 (1) ◽  
pp. 20-35 ◽  
Author(s):  
Paulina A. Bahamonde ◽  
April Feswick ◽  
Meghan A. Isaacs ◽  
Kelly R. Munkittrick ◽  
Christopher J. Martyniuk
Keyword(s):  
Environmental Monitoring ◽  
Ecosystem Health ◽  
Monitoring Program

scholarly journals On the connection between terrestrial and riparian vegetation: the role of storage partitioning in water-limited catchments

2016 ◽  
Vol 31 (2) ◽  
pp. 489-494 ◽  
Author(s):  
Saúl Arciniega-Esparza ◽  
José Agustín Breña-Naranjo ◽  
Peter A. Troch
Keyword(s):  
Riparian Vegetation
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