ESA Certified Ecologist (Ecologist-in-Training, Ecologist, Senior Ecologist)

USA · Ecological Society of America · professional · unverified source

114practice questions written to this syllabus
6subjects

Format

Application review of education and experience; no written exam is known.

Sections

Over the years

Listed for the biodiversity and EIA career routes. Built from general knowledge.

Official source: https://www.esa.org/

Subjects this exam draws on

Land Degradation, Desertification & Soil Conservation2 questionsBiodiversity Science & Conservation28 questionsEcosystem Services & Pollinators in Agricultural Landscapes36 questionsLandscape Ecology, Protected Areas & Human-Wildlife Interactions29 questionsLivestock & the Environment1 questionsResearch Methods in Environmental & Sustainability Science18 questions

Five practice questions, worked

Original questions written to this exam's published syllabus and pattern. Not past papers.

1. What did satellite studies of the Sahel from the 1980s onward show about desertification?

  1. Complete loss of all vegetation across the Sahel by the year 2000
  2. No change at all in vegetation cover across the region since the 1970s droughts
  3. Substantial re-greening as rainfall partly recovered and farmers adopted practices such as FMNR
  4. A continuous southward advance of the Sahara of several kilometres every single year since the 1970s droughts
Answer and working

C. Substantial re-greening as rainfall partly recovered and farmers adopted practices such as FMNR

Separating climate fluctuation from human-induced degradation changed the narrative.

Land Degradation, Desertification & Soil Conservation · Desertification and drylands

2. Why may functional diversity matter more for ecosystem functioning than species richness alone?

  1. Ecosystem processes depend on the range of traits and roles species play
  2. Functional diversity counts only the rarest species found in each community
  3. Species richness cannot be measured in any real ecosystem
  4. Functional diversity is always identical to species richness
Answer and working

A. Ecosystem processes depend on the range of traits and roles species play

Two communities with equal richness can differ in the variety of traits (rooting depth, nitrogen fixation, pollination) that drive productivity, nutrient cycling and resilience. Functional diversity is not about rarity, richness can be measured, and the two are not identical.

Biodiversity Science & Conservation · Levels of biodiversity: genetic, species, ecosystem

3. Why does CICES omit 'supporting services' as a separate category?

  1. Because supporting services do not exist in any real ecosystem anywhere
  2. To avoid double counting processes already reflected in final services
  3. Because supporting services can be valued only by markets
  4. Because CICES covers only cultural services of urban parks
Answer and working

B. To avoid double counting processes already reflected in final services

Supporting processes such as nutrient cycling underpin final services like crop production; counting both would double count. CICES classifies final services into provisioning, regulation and maintenance, and cultural.

Ecosystem Services & Pollinators in Agricultural Landscapes · Ecosystem service frameworks: MA, TEEB, CICES, IPBES nature's contributions to people

4. What distinguishes landscape composition from configuration?

  1. Composition is spatial arrangement; configuration is what is present
  2. Both describe only the number of species in each patch
  3. Composition applies to soils; configuration applies to climate
  4. What vs where
Answer and working

D. What vs where

Composition describes the types and proportions of elements; configuration describes how they are arranged — size, shape, isolation. The other options reverse or misapply the terms.

Landscape Ecology, Protected Areas & Human-Wildlife Interactions · Landscape structure: patches, corridors and matrix

5. What do controlled studies generally show about intensive rotational ('holistic') grazing compared with well-managed continuous grazing at the same stocking rate?

  1. Rotational grazing usually doubles forage production and reverses desertification within a few years
  2. Rotational grazing sequesters enough soil carbon to offset all the herd's methane emissions
  3. Continuous grazing always destroys rangeland, while rotational grazing never causes any degradation
  4. Differences in plant and animal production are often modest; stocking rate matters more
Answer and working

D. Differences in plant and animal production are often modest; stocking rate matters more

Most controlled comparisons find small differences; large claims for carbon and desertification reversal are contested.

Livestock & the Environment · Grazing ecology, rangeland health and overgrazing

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