Evidence map›Paper›PMID 30901366›Full record

ArticlePloS one2019

Do topography and fruit presence influence occurrence and intensity of crop-raiding by forest elephants (Loxodonta africana cyclotis)?

Steeve Ngama, Jerome Bindelle, John R Poulsen, Jean-Luck Hornick, Annick Linden, Lisa Korte, Jean-Louis Doucet, Cédric Vermeulen

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
1.6field-weighted citation impact, top 17% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed, 28 citations in OpenAlex.

  1. Effects of organized guarding on mortality from human-elephant conflict in northeast India.Conservation biology : the journal of the Society for Conservation Biology · 2026
    Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 2 countries.

Steeve NgamaTERRA Teaching and Research Centre, Forest Is Life, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.ORCID 0000-0002-9473-1714
Jerome BindelleAgroBioChem/TERRA, Precision livestock and nutrition unit/Agriculture Is Life, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.
John R PoulsenNicholas School of the Environment, Duke University, Durham, North Carolina, United States of America.
Jean-Luck HornickFundamental and Applied Research on Animal and Health, Animal Production Department, Faculty of Veterinary Medicine, University of Liège, Belgium.
Annick LindenSurveillance Network of Wildlife Diseases in Southern Belgium, Faculty of Veterinary Medicine, Liege, Belgium.
Lisa KorteIndependent Biodiversity and Natural Resources Specialist, Saint Cloud, MN, United States of America.
Jean-Louis DoucetTERRA Teaching and Research Centre, Forest Is Life, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.
Cédric VermeulenTERRA Teaching and Research Centre, Forest Is Life, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.
University of Liège · BEDuke University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Crop damage by forest elephants (Loxodonta africana cyclotis) and the resulting human-elephant conflict are issues of great concern for both the conservation of the species and the protection of rural livelihoods in Central Africa. Addressing these problems requires identifying the factors that facilitate or impede crop-raiding by forest elephants. Yet to date, the environmental or anthropogenic factors that influence the occurrence and intensity of crop-raiding by forest elephants are largely unknown. We used a multivariate approach to investigate conditions under which forest elephants raid some fields and not others in the buffer zone of Monts de Cristal National Park (MCNP), Gabon. We first interviewed 121 farmers from 11 villages situated within 10 km of MCNP regarding the occurrence of elephant crop-raiding of their fields. We then collected data on 39 explanatory variables to characterize the agricultural fields. Of these, the most important predictors of elephant raid occurrence of crop damage were presence of fruit trees, elephant deterrents (scarecrows, fire, wire string fences and empty barrels), and field topography. We secondly assessed the effect of stage of crop growth, presence of fruit trees, field topography and presence of elephant deterrents on crop-raiding occurrence and intensity by counting raids and measuring areas of crop damage every week in 17 plantations over 19 weeks in the most elephant-impacted zone of the study area. We found that fruit presence and stage of crop growth led to more intense damage to crops, whereas local deterrents did not inhibit raiding events and crop damage by elephants. We report a tradeoff between non-timber forest products (NTFP) services and crop-raiding by elephants. We show for the first time that steep topography impedes elephant damage to crops with no raids recorded in fields with surrounding slopes greater than 25%. We discuss whether farming on steep fields could be used as a strategy for mitigating crop-raiding to favor human-elephant coexistence and enhance elephant conservation.

Indexed as

AnimalsConservation of Natural ResourcesCrops, AgriculturalEcosystemElephantsFarmersForestsFruitGabonHumansParks, RecreationalTrees

Identifiers

PMID30901366
PMCPMC6430389
OpenAlexW2941463689

What OpenQuestion holds

Textmetadata
LicenceCC0
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.