Leonardo Ulloa’s composed strike sealed a vital win against Leeds, as Albion moved to within a point of the play-off places.
The Argentine’s deft finish was enough to complete back-to-back home victories for Oscar Garcia’s side and put pressure on the teams currently occupying the top six positions.
In a game which has usually offered a goal-filled affair, the two sides played out a comparatively cagier encounter than the previous 3-3 and 2-2 draws at the Amex.
The Seagulls generated the better of the opportunities in the first-half, as Solly March and Andrea Orlandi continued to cause the Yorkshiremen problems down the flanks.
Orlandi created the first Albion chance inside four minutes, as his dangerous ball into the area found March and then David Rodriguez, who both saw their efforts blocked.
March looked lively throughout the opening 45 minutes, and after linking up well with Calderon, he surged towards the area only to be fouled by Rodolph Austin. Orlandi’s resulting free-kick went over the bar.
Albion’s wing-play created a number of problems for the Leeds backline, as March found Rodriguez in space, but the forward fired his shot over the bar.
Orlandi then created an opportunity for South American marksmen Leonardo Ulloa, but the Argentine fired the Italian’s deft pass into the side-netting.
In contrast Leeds offered little going forward, with Danny Pugh’s off target shot being the extent of their opportunities.
The Elland Road side started the second-half on a lively note, as Ross McCormack’s free-kick was punched away by Tomasz Kuszczak before Gordon Greer cleared the danger.
The Seagulls looked threatening on the counter-attack, as Orlandi found Ulloa inside the box, but the striker could not supply the required finish.
But the Argentine redeemed himself just moments later by scoring the decisive goal of the match in the 64th minute.
Substitute Kazenga Lua Lua worked his way down the left-hand side and Ulloa latched onto the resulting cross, took a touch and fired past a rootless Paddy Kenny with the outside of his foot.
With the sense of relief evident around the Amex, Albion created further chances when March’s deflected drive was saved by Kenny before the youngster saw another effort hit the side-netting.
Lua Lua then made a trademark inside run towards the edge of the box, before seeing his shot go wide past Kenny’s far post.
But Leeds struggled to get a foothold in the match and Kuszczak comfortably dealt with Mowatt’s shot after he linked up well with Jimmy Kebe.
Albion continued to play out the closing stages without really being threatened and extended their unbeaten home run to seven games in the process.