Progress report March 19

33 %
67 %
Information about Progress report March 19
Education

Published on March 18, 2014

Author: AFilazzola

Source: slideshare.net

DECOUPLING THE MECHANISTIC PATHWAYS OF INTERACTIONS BETWEEN SHRUBS AND ANNUAL PLANTS IN SEMI-ARID AND ARID ECOSYSTEMS. Alessandro Filazzola MSc Candidate Progress Report – March 19th

Novelty

Novelty More than one dominant mechanism may operate at a time Smit et al. 2009

Novelty Herbivore Protection Abiotic stress reduction Increased Herbivory Abiotic stress reduction Herbivore protection Resource competition

Novelty Positive plant interactions change with plant life-stage 0 5 10 15 20 25 1 2 3 4 5 6 7 8 9 10 PlantTrait Distance from Dominant Juvenile 0 5 10 15 20 25 1 2 3 4 5 6 7 8 9 10 PlantTrait Distance from Dominant Juvenile Adult Adapted from Miriti 2006 FarNear

Authors Topic Approach Tested Rousset and Lepart 2001 Ontogenetic shifts from positive to negative interactions with nurse plants Biotic stress Schiffers and Tielborger 2006 Temporal shifts from facilitation to competition with growing season Abiotic stress Miriti 2006 Ontogenetic shift from facilitation to competition in a desert shrub Abiotic stress Inferred Callaway 1998 Competition and facilitation change along an elevation gradient Abiotic stress Callaway and Walker 1997 Competition and facilitation change with plant life-stage Review Novelty

Novel contributions to ecological theory • Decouple plant interactions by life-stage • Decouple dominant mechanisms Objectives

• To decouple the different mechanistic pathways of positive plant interactions based on subordinate life-stage Purpose

Chpt Title Progress 1 A systematic review and conceptual framework for the mechanistic pathways of dominant plants Re-submitted to GEB March 10 2 A meta-analysis of benefactor plant mechanisms based on beneficiary life-stage. Papers compiled – Data needs to be extracted. 3 Ontogenetic shifts from positive to negative interactions between desert plants change on an environmental gradient. Active 4 Shrubs directly and indirectly increase seed densities under canopy in arid environments. Active 5 Experimental manipulations of micro- environmental conditions and herbivory of shrubs in an arid system. To be set up – April 2014 6 Experimentally testing the importance of the shrub (E. californica) as a tool for restoration of semi- arid grasslands Need to meet with local land managers

Chapter 3 Purpose: To determine how desert shrubs mediate annual plant productivity to changes in drought stress and subordinate progression through plant life-stages. H: The sign of net interactions between shrubs and annuals changes with annual plant life stage and water availability.

Chapter 3 2013  Measure shrub characteristics 2014  Artificial water gradient

Chapter 3 Gradient Water (L) Precipitation (cm) # Shrubs Frequency Precip/event 0 0 0 20 5 0 1 10 4 20 5 0.8 2 16.25 6.5 20 5 1.3 3 22.5 9 20 5 1.8 4 28.75 11.5 20 5 2.3 5 35 14 20 5 2.8

RIISoilMoisture

Chapter 4 Purpose: To determine if facilitation of annual seeds by shrubs is a dominant pathway responsible for annual plant distribution in desert environments. H: Shrubs act to increase seedbank densities for annual plants in desert systems either directly or indirectly.

Chapter 4 e+ Seed Plant Reproduction e+ e+ e+ e+ e+

1) Compare Microsites Shrub > Open 2) Compare controls C > S 3) Compare seeds removed A > O 4) Compare effect size of 2 & 3 2-e+ > 3-e+

1) Compare Microsites Shrub > Open 2) Compare controls C > S 3) Compare seeds removed A > O 4) Compare effect size of 2 & 3 2-e+ > 3-e+

Chapter 5 Purpose: To decouple shrub-mediated herbivory effects on annuals from micro-environmental effects. H: The relative difference in annual plants between shrub and open microsites decreases with reductions in consumer pressure and drought stress

Biotic stress e+ Seed Seedling Growth Reproduction e+ e+ e+ Abiotic stress e+ e+ Survey/Measure Subordinate response XX

Chapter 5

Biotic stress e+ Seed Seedling Growth Reproduction e+ e+ e+ Abiotic stress e+ e+ e+ e+ e+ Chapter 3: Decoupling abiotic stress amelioration by life-stage Chapter 4: Decoupling seed trapping mechanism by life-stage Chapter 5: Decoupling biotic stress reduction by life-stage e+

Chapt Title Short term goals Long Term goals Dates 3 Ontogenetic shifts from positive to negative interactions between desert plants change on an environmental gradient. Repeat census, collect biomass and seeds, environmental data Paper submitted for August 2014 Jan-April census 2014 4 Shrubs directly and indirectly increase seed densities under canopy in arid environments. Repeat census, add new seed capturing devices and measurements Decouple the direct and indirect mechanisms of seed facilitation Jan-April census 2014-2016 5 Experimental manipulations of micro-environmental conditions and herbivory of shrubs in an arid system. Set up herbivory exclosures Water additions in 2015 and measure annual success. Jan-April census 2015-2016 Upcoming field work

Thank you!

Add a comment

Related presentations

Related pages

Review of vocational education: the Wolf report ...

This review makes detailed recommendations for how to help improve, create and maintain vocational education for 14- to 19-year-olds.
Read more

Wolf recommendations progress report - Publications - GOV.UK

February 2015 final progress report on meeting the recommendations in Professor Wolf’s independent review of vocational education.
Read more

Agency Reports | USDA Newsroom - U.S. Department of ...

Reports . Agency Reports USDA's Results. Image and Video Libraries. Secretary's Photo Gallery Streaming Media Archives Creative Media and Broadcast Center.
Read more

Progress reports - European Commission | Choose your ...

Progress reports of the EFTA Countries Norway ... Commission renewable energy progress report. Member State progress reports in their ... 19 January 2016 ...
Read more

Progress Report - AEP Home | AEP - Environment and Parks

Progress Report December 1, 2008-March 31, ... water for life Progress Report 2008-2011 19 ... The team also provides progress reports to the Alberta Water ...
Read more

Healthcare-associated Infections (HAI) Progress Report ...

HAIs are associated with a variety of causes, including the use of medical devices, such as catheters and ventilators, complications following a surgical ...
Read more

Healthcare-associated Infections (HAI) Progress Report ...

The National and State Healthcare-Associated Infections Progress Report expands upon and provides an update to previous reports detailing progress toward ...
Read more

The Costs of Mass Deportation | Center for American Progress

The Costs of Mass Deportation Impractical, ... Madura Wijewardena | Friday, March 19, 2010. PRINT ... Our report adopts conservative assumptions for key ...
Read more

PROGRESS REPORTS lstMP 2 MP 3 MP 4tbMP Start ofMarking ...

PROGRESS REPORTS lstMP 2011 ... Open Parent Portal Oct 9 Dec 19 March 7 May 19 REPORT CARDS lstMP 2nd MP 3rdMP 4tbMP Start ofMarking Period Sept 4 Nov 13 ...
Read more

The Profit on CNBC Progress Report March 19th Episode ...

The Profit – Progress Report . March 19, 2015 . In the March 19th episode of The Profit on CNBC, viewers were treated to a progress report of some ...
Read more