"edge effect" meaning in English

{
  "forms": [
    {
      "form": "edge effects",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "edge effect (plural edge effects)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ecology",
          "orig": "en:Ecology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A change in population or community structures that occurs at the boundary of two or more habitats."
      ],
      "id": "en-edge_effect-en-noun-4wQ0yiUZ",
      "links": [
        [
          "ecology",
          "ecology"
        ],
        [
          "change",
          "change"
        ],
        [
          "population",
          "population"
        ],
        [
          "community",
          "community"
        ],
        [
          "structure",
          "structure"
        ],
        [
          "boundary",
          "boundary"
        ],
        [
          "habitat",
          "habitat"
        ]
      ],
      "raw_glosses": [
        "(ecology) A change in population or community structures that occurs at the boundary of two or more habitats."
      ],
      "topics": [
        "biology",
        "ecology",
        "natural-sciences"
      ]
    }
  ],
  "word": "edge effect"
}

{
  "forms": [
    {
      "form": "edge effects",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "edge effect (plural edge effects)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Ecology"
      ],
      "glosses": [
        "A change in population or community structures that occurs at the boundary of two or more habitats."
      ],
      "links": [
        [
          "ecology",
          "ecology"
        ],
        [
          "change",
          "change"
        ],
        [
          "population",
          "population"
        ],
        [
          "community",
          "community"
        ],
        [
          "structure",
          "structure"
        ],
        [
          "boundary",
          "boundary"
        ],
        [
          "habitat",
          "habitat"
        ]
      ],
      "raw_glosses": [
        "(ecology) A change in population or community structures that occurs at the boundary of two or more habitats."
      ],
      "topics": [
        "biology",
        "ecology",
        "natural-sciences"
      ]
    }
  ],
  "word": "edge effect"
}