一般影響
豬的掘根行為會擾亂種子庫，減少地表植被和改變土壤性質包括，增加土壤溫度，增加或減少土壤氮含量，增加土壤氧化和提高土壤滲出鈣，磷，鋅，銅，鎂。(Kotanen 1994, Singer Swank and Clebsch 1984, Arrington, Toth and Koebel 1999, in Wolf and Conover 2003). 此外，豬的掘根行為也創造大量醜陋的開放空間，減少多年生植被而且增加外來一年生草本植物的生長空間。(Kotanen 1994, in Wolf and Conover 2003)在其原生地瑞典，豬通常喜歡在落葉森林的潮溼土壤中到處掘根，比較不喜歡土壤乾的牧草地； 從秋季到早春最常掘根。(Welander 2000, in Wolf and Conover 2003)野豬可提高濕地植物多樣性；(例如在 Kissimmee 河洪泛區上)或它可能破壞沿海沼澤棲地，增加濕地消失情形。 豬若干程度地破壞生態系統。在大煙山，預期它們會減少林下草本植被約 5%，他們破壞了紅回田鼠和短尾鼩的落葉棲息地，也吃瀕危的紅頰蠑螈和瓊斯齒蝸牛。估計他們會使土壤中小型無脊椎動物減少 80%。最後他們掘根的習慣會加速土壤侵蝕和增加河流淤積。(Peine and Farmer 1990, in Wolf and Conover 2003) 本土羊齒植物是夏威夷野豬的主要食物。野豬會直接採伐或啃食一些本土樹種而使其死亡。羊齒植物與附生植物的破壞，給koa-ohia森林帶來可觀的植被損失； 已知野豬也會積極地散播外來入侵草莓番石榴的種子(Diong 1982)。豬會大量吃本地無脊椎動物，如蚯蚓和蝸牛。(e.g. Meads et al. 1984). 在聖地牙哥島(厄瓜多)野豬會吃大量的烏龜與海龜的蛋，使其族群減少。豬可能也吃海鳥的蛋與幼體，例如信天翁、shags 與boobies。不像在夏威夷，在聖地牙哥島上，豬不會對本土植物產生負面的衝擊； 這是由於植物對一般草食動物增加抵抗性，特別是對原生大烏龜。(Colblentz Baber 1987, in Wolf and Conover 2003). 豬掘根的習慣也會損害耕地作物。一項加州40個縣的研究紀錄，豬造成的經濟損失約為1,730萬美元。在德克薩斯(1989與1994之間)野豬造成的農作物損害在 $10000 與 $300000 之間.(Tollesonet al1995, in Wolf and Conover 2003)掘根損害灌溉系統和池塘。(Frederick 1998, in Wolf and Conover 2003)豬明顯地減少長葉松人造林的幼苗生長。(Lipscomb 1989,in Wolf and Conover 2003)相傳，豬會增加 根腐菌(Phytophthora cinnamomi)引起的疾病的死亡率。(Auld and Tisdell 1986) 野豬能夠傳播普魯斯病、假狂犬病、犬鉤端螺旋體症、口蹄疫與日本腦炎。(Tolleson et al1995, in Wolf and Conover 2003; Hampton et al. 2004). 野豬可能攜帶蠕蟲寄生蟲，透未煮熟的肉傳遞給人類，威脅人類健康。在西班牙荒野豬狩獵作為食用魚進位 毒漿蟲 gondii。(高斯 et al.2005)
地點特有的影響：Australia 
棲地改變: Fleay’s Barred-frog (Mixophyes fleayi) is listed as 'Endangered (EN)' in the IUCN Red List of Threatened Species. Endemic to Australia it occurs in wet forests from the Conondale Range in south-east Queensland, south to Yabbra Scrub in north-east New South Wales. While the specific reason for its decline is not known large areas of its habitat are being degraded and altered due to urban encroachment, forest logging, trampling and rooting by pigs (Sus scrofa) and domestic stock; and the invasion of alien invasive weeds like mistflower (Ageratina riparia) and crofton weed (Ageratina adenophora). The Chytrid fungus (Batrachochytrium dendrobatidis) has been identified as the cause of illness and death in some populations (Hines et al 2004).
棲地改變: The Southern Gastric Brooding Frog (Rheobatrachus silus) is listed as 'Extinct (EX)' in the IUCN Red List of Threatened Species. Endemic to Australia it occured in the Blackall and Conondale Ranges in south-east Queensland inhabiting streams and catchments of the Mary, Stanley and Mooloolah Rivers. It has not been recorded in the wild since 1981. The reasons for its decline are unknown; the Chytrid fungus (Batrachochytrium dendrobatidis) is suspected to have caused declines in populations. Its habitat is also degraded due to trampling and rooting by pigs (Sus scrofa) and the spread of the alien mistflower (Ageratina riparia) (Meyer et al 2004)
棲地改變: The Mount Glorious Day Frog (Taudactylus diurnus) is listed as 'Extinct (EX)' in the IUCN Red List of Threatened Species. An Australian endemic, it occurred in disjunctive populations in three sub-coastal mountain ranges (Blackall, Conondale, and D’Aguilar Ranges) in the south-east Queensland region from Coonoon Gibber Creek in the north to Mount Glorious in the south. It has not been recorded in the wild since 1979. The reasons for its decline are unknown; the Chytrid fungus (Batrachochytrium dendrobatidis) is suspected to have caused declines in populations. Its habitat is also degraded due to trampling and rooting by pigs (Sus scrofa) and the spread of the alien mistflower (Ageratina riparia); Lantana (Lantana camara) and the alien grass Baccharis halimifilia. Frog populations were absent where pigs had caused damage and where alien plants had invaded (Hero et al 2004). Nuku Hiva Is. (French Polynesia)
威脅瀕危物種: Grazing by feral pigs pose a major threat to the survival of the monotypic 'Critically Endangered (CR)' palm Pelagodoxa henryana (Johnson 1998) Montserrat
威脅瀕危物種: Sus scrofa are believed to trample and predate turtle nests (Martin, 2003 in Varnham, 2006). Marine turtles that nest in Montserrat include the 'Critically Endangered (CR)' Hawksbill turtles (see Eretmochelys
imbricata in IUCN Red List of Threatened Species); the 'Endangered (EN)' green turtle (see Chelonia
mydas in IUCN Red List of Threatened Species); the 'Endangered (EN)' loggerhead turtle (see Caretta
caretta in IUCN Red List of Threatened Species) and the 'Critically Endangered (CR)' leatherback turtle (see Dermochelys
coriacea in IUCN Red List of Threatened Species).
S.
Scrofa are thought likely to predate slower moving herpetofauna, such as 'mountain chicken' the near-endemic 'Critically Endangered (CR)' (see Leptodactylus
fallax in IUCN Red List of Threatened Species), and perhaps, if they enter its range, the endemic Montserrat galliwasp (see Diploglossus
montisserrati in IUCN Red List of Threatened Species) (Pers.comm., Hilton, 2004 in Varnham, 2006).
S. scrofa are likely to directly destroy mountain chicken nests by their extensive digging and wallowing along watercourses (Pers.comm., Hilton, 2004 in Varnham, 2006).
棲地改變: Sus scrofa uproot patches of Heliconia caribbea plants, the main nest plants for the 'Critically Endangered (CR)' endemic Montserrat oriole (see Icterus oberi in IUCN Red List of Threatened Species) and a valuable food source for nectarivorous birds and insects. Loss of this plant may also increase soil erosion and flooding downstream (Pers.comm., Hilton, 2004 in Varnham, 2006)
生態系統變化: Sus scrofa In medium-long term they are likely to have a very major impact on forest ecology, in particular through arresting tree succession (by eating seedlings) (Pers.comm., Hilton, 2004 in Varnham, 2006).
降低本地生物多樣性: Sus scrofa are often reported as eating large numbers of terrestrial arthropods (though population impacts under-recorded). New Caledonia (Nouvelle Caledonie)
捕食: Warner (1948) mentions several introduced species as predators of a native bird called the kagu ("http://www.iucnredlist.org/details/143794/0">Rhynochetos jubatus see in IUCN Red List of Threatened Species). “Escaped pigs and the introduced rats are … causing heavy damage to the kagu at the present time. They not only kill the birds but also destroy its food supply of land snails and large earthworms…. I often found snail shells in rat runways and burrow entrances and scattered about in other odd places. Many of these had been gnawed in typical rat fashion.… The pig and rat may also take young birds and eggs …"
競爭: Warner (1948) mentions several introduced species as predators of a native bird called the kagu (Rhynochetos jubatus see in IUCN Red List of Threatened Species). “Escaped pigs and the introduced rats are … causing heavy damage to the kagu at the present time. They not only kill the birds but also destroy its food supply of land snails and large earthworms…. I often found snail shells in rat runways and burrow entrances and scattered about in other odd places. Many of these had been gnawed in typical rat fashion.… The pig and rat may also take young birds and eggs …" Hawaiian Islands (United States (USA))
物理干擾: “Watersheds, forests, and range are damaged when pigs root excessively ….” On Hawai‘i, with the control of feral goats and the elimination of feral sheep from certain habitats, the feral pig “has emerged as the most prominent agent of ecological perturbation, of wet forests in particular”.
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