在夏威夷，四線笛鯛與鬚鯛Mulloidichthys sp等本地魚類分享同一棲地(Friedlander 等人, 2002)。這可能會導致彼此競爭棲地和食物來源。有證據顯示，四線笛鯛可能會取代本地魚類重要的庇護棲息地。競爭庇護區似乎是最重要的影響，佔優勢的四線笛鯛(Lutjanus kasmira)能夠從提供庇護的珊瑚礁區，取代原生魚類(Schumacher和Parrish 2005)。也有人認為，夏威夷蓄意引進四線笛鯛，已經導致當地許多其他重要的漁獲種類被替代(Russo 1994; FAO 2001)。然而，這仍然是一個有爭議的話題，需要更多的生態研究調查。也可能會把疾病傳染給本地魚類(Work 等人, 2003)。
Kaua`i Is. (United States (USA))
競爭: In a study by DeFelice and Parrish (2003) at Hanalei Bay overall dietary overlap between L. kasmira and other fish species was found to be relatively low and there was no indication that food resources were limiting in this habitat. The stomachs of 15 L. kasmira (10.0–17.9cm SL) were found to contain mainly small caridean shrimps, especially Ogyrididae. The diet of L. kasmira overlapped somewhat with that of Albula sp. and less so with that of Mulloidichthys pflugeri. L. kasmira and Albula sp. had stomatopods, ogyridid shrimp, and portunid crabs in common in their diet, and L. kasmira and M. pflugeri shared stomatopods, penaeid shrimp, portunid crabs, and small cryptic fishes.
Oahu Is. (United States (USA))
捕食: 40% of the diet of L. kasmira is fish (Russo 1994).
競爭: There seems to be no significant overlap in diet to support intense competition for food between L. kasmira and locally important fish species such as Parupeneus porphyreus or Mulloidichthys jlavolineatus. The ecological niche of L. kasmira is still not completely understood, and more information is needed to conclusively determine why it has increased greatly in abundance since 1958 while other fish species important to the local fishermen have declined (Russo 1994).
經濟 /民生: Local fishermen suspect that L. kasmira may eat the juveniles of locally important fish species as 40% of its diet is fish. However, there is little conclusive evidence to support this. Oda and Parrish (1982) found some evidence of holocentrid fish (genus Myripristis) remains in the guts of L. kasmira but not in sufficient quantity to justify its classification as a major fish predator of locally important fishes (Russo 1994).
Hawaii (United States (USA))
傳播疾病: In Hawaii, taape have been found infected with bacteria and an apicomplexan protozoan compatible with a coccidian. Disease transmission may negatively impact native marine fishes that are closely associated with taape (Work et al. 2003).
競爭: Taape may compete with native fish through habitat use, diet, predation on larvae, or disease transmission to native fish (Work et al. 2003). Although no direct competition between native fish and taape has been documented taape do share the same habitat with native fish and closely associate with certain native fish such as goatfish Mulloidichthys sp. (Friedlander et al. 2002).
Schumacher and Parrish (2005) found that habitat use patterns of the yellowtail goatfish (Mulloidichthys vanicolensis) are most similar to those of L. kasmira. Both species are primarily found low in the water column and closely associated with areas of vertical relief. Individual M. vanicolensis were found higher in the water column when L. kasmira were present, but the latter were not similarly affected by M. vanicolensis. This finding suggests competition for shelter does occur between the two fish and that the dominant L. kasmira displaces M. vanicolensis from areas of the reef which offer protection.